ug-maths-physics

[vestal swift]

And idk if I'm putting in the wrong keywords, the first page of Google results page isn't that helpful either 😭

[rancid schooner]

Nice. :) When’s the interview?

[vestal swift]

Somewhere in may :`)

[rancid schooner]

Have fun!

[tawdry gull]

for those who are interested in solving

[tawdry gull]

a more challenging version would be to prove the limit

[stark wave]

Why

[tawdry gull]

oh hey there

[stark wave]

Everyday I want to switch out of maths

Henlo

[tawdry gull]

u must be a maths-physics major

care to solve it?

🙏 😊

[stark wave]

Not particularly

[tawdry gull]

😿

[stark wave]

That stuff scares me

[tawdry gull]

man 😔

[stark wave]

How's your degree going man

[tawdry gull]

yeah finals are done

so umm

gonna be out of uni soon

[stark wave]

Congrats

You transferring right?

[tawdry gull]

yeahh

[stark wave]

Where are you going to?

[tawdry gull]

Sry late reply

Either hk or sg

[stark wave]

Nicee

[swift zinc]

Idek how to approach

[tawdry gull]

@rancid schooner

[tawdry gull]

Spoiler for hint ||The easy way is to convert it into sin & use small angle approximation||

[rancid schooner]

Interesting 😄

[tawdry gull]

Try it out

[rancid schooner]

Please host a study session an explain how to solve it :)

Riemann sum?

[swift zinc]

How would you solve it with Riemann sums🤯

[rancid schooner]

so no need for Riemann sum :)

[tawdry gull]

Yess

I found the limit thru riemann sum

But proving its limit is a very challenging one

You can try prove that the limit is 1/4 if you are willing to haha @rancid schooner

[rancid schooner]

😊

Is the proof above valid? It uses the cos expansion.

@tawdry gull

[tawdry gull]

It should be fine

I used small angle approximation for that one too anyway

[rancid schooner]

Nice. Do share your proof.

[tawdry gull]

https://media.discordapp.net/attachments/662861673929113600/971485757808214056/IMG_0725.png

[rancid schooner]

Nice

[tawdry gull]

https://media.discordapp.net/attachments/662861673929113600/971485758194065428/IMG_0726.png

Thats the formal proof

[rancid schooner]

Looks intimidating

[tawdry gull]

Quite haha

[rancid schooner]

This is a sample IB HL maths question on combinatorics. What's the best way to approach this and similar problems? @tawdry gull

[swift zinc]

im having a stroke trying to even start solving these

[stuck rapids]

https://tenor.com/view/keshav-kulkarni-scared-scary-scared-af-shriman-shrimati-gif-23608755

[swift zinc]

@rancid schooner @tawdry gull any hints

[tawdry gull]

Which?

[swift zinc]

ig the first one, ill see if i can figure out the later ones by myself

[tawdry gull]

I have a feeling that 1a is true

1c is false, just pick any two vectors that are a multiple of each other

1d shud be true cuz if distinct degrees, then each polynomial cant be represented by the other 2

For 1b, not necessarily if m>n

These are just my feelings ya

Cuz i cant use my ipad to write anything

I’m outside rn

@swift zinc

[swift zinc]

thank you so much

imma start with this and see how far i can go

[tawdry gull]

Okay do ur best

:D

[swift zinc]

:D

[rancid schooner]

@tawdry gull ‘s the man 😄

[swift zinc]

You tooo

And @MDragon

[swift zinc]

Where'd he go

[rancid schooner]

He seems to have disappeared. Maybe we can ask @stuck rapids where he’s gone.

[stuck rapids]

how m i supposed to know xD

tho he is still here

[rancid schooner]

Haha thought he’s your friend and you introduced him to this server

[stuck rapids]

We aren't rl friends tho Mr alex hahaga

[tawdry gull]

@stuck rapids u malaysia?

I’m in malaysia now

Johor baru

[stuck rapids]

Yeahhh betul

[vestal swift]

What brings you to JB? :o

[tawdry gull]

Cousin im JB

*in

I’m in their house now haha

Gonna stay here for 2 days

[vestal swift]

Have fun! :)

And enjoy the food 😎

[tawdry gull]

U at KL?

[vestal swift]

Ipoh

[tawdry gull]

Ooo

[vestal swift]

3hr drive from KL :(

[tawdry gull]

How far from jb?

What abt crysto?

[vestal swift]

Depends on the mode of transportation 😂

If bus 7hours + I think 😂😂

[tawdry gull]

My god

[vestal swift]

Ikr hahahha

[rancid schooner]

Enjoy your stay!

[tawdry gull]

Thanks haha

Gonna go to bookstore at some time

Look for math books

[rancid schooner]

Haha thought you staying away from maths during holidays

[tawdry gull]

Depends haha

[vestal swift]

Which bookstore got math books hahaha

In Malaysia the most famous bookstore is Popular bookstore but I couldn't find math books there (or at least for the outlet I went to) 🥲

[rancid schooner]

That’s more of a stationery shop

And shop for revision guides

Probably more choices in Singapore

Unless KL then there’s Kinokuniya

[tawdry gull]

Who knows haha

Sadly no kinokuniya in jb

[rancid schooner]

Who’s hosting the physics study session later today?

[hushed dock]

@worldly monolith

[rancid schooner]

I see

[vestal swift]

Ah never heard of this, AlexV confirmed Malaysian 😆

[rancid schooner]

There's also one in Singapore:)

#chat-lounge

[tawdry gull]

Two actually haha

[tawdry gull]

Wah so many spm materials ah

[stuck rapids]

Kl lang

[stuck rapids]

He confirmed it himself hahhaa

[rancid schooner]

Yes. Not a real bookstore. Just revision material. Everyone just wants good grades. Not to understand the material.

[stuck rapids]

Yeah mostly spm stuff

[rancid schooner]

When did he do that?

[vestal swift]

This Popular?

It's sad how Popular "bookstore" in our country has shitty tiktok celebs book but no math books

Priorities smh

[rancid schooner]

But you might find some junior maths olympiad (not IMO) training books with some interesting questions.

[stuck rapids]

😏 U said one mah

[tawdry gull]

Yes it’s Popular

[stuck rapids]

Got ah hahahha

[rancid schooner]

So what is πerrot’s impression of the standard of SPM Add Maths?

[stuck rapids]

The outlet nearby my house has a lot of novels/ eng chi Malay

[vestal swift]

Shameful

[tawdry gull]

Unfortunately i cant open the spm add maths book

[stuck rapids]

HAHAHHA INSTA I SAW

[tawdry gull]

It’s sealed

Actually nvm

[stuck rapids]

Uni books rly no sia..

Based on my experience

[stuck rapids]

Only up to stpm level

[tawdry gull]

Spm is igcse level right

Stpm is a level

[rancid schooner]

Yes

[vestal swift]

No Success reference books? Those are really good SPM books man

[stuck rapids]

Can see why u were this frustrated hahaha

[tawdry gull]

Ok ok

[vestal swift]

Oh wait nvm Oxford fajar stopped publishing books I think 😔

[rancid schooner]

You can ask the shop assistant to open the plastic wrapping. It’s more of a dust cover.

[tawdry gull]

Spm add math is close to igcse add math

Not bad lah

[vestal swift]

Harder I would say

[tawdry gull]

Oh ya?

[vestal swift]

Imo, AS maths is easier than SPM add maths

[tawdry gull]

I just skim & scan the book 😂😂

Ouhh

[rancid schooner]

Some of the questions are supposed to invoke higher order thinking skills so a bit creative. But the examiners sometimes go too far out of the way.

[vestal swift]

Yeah but exam questions, either the phrasing too ambiguous or it's like super big brain

[stuck rapids]

👀

[rancid schooner]

And some questions are not watertight or not clearly worded

[stuck rapids]

Alex knows the details so well

[tawdry gull]

Clearly experienced

😂😂

[vestal swift]

SPM add math state papers haha
https://trial.spmpaper.me/?dir=2021%2FMatematik Tambahan (Add Math)

[rancid schooner]

People complain online haha

Why do they have state papers?

And should we create a thread?

[vestal swift]

Eesh no point denying we all know you're Malaysian😂

[rancid schooner]

Otherwise we might get thrown out

Or move to #chat-lounge

[stuck rapids]

He even confirmed it himself in da pm

[stuck rapids]

👀 🧠

[vestal swift]

These are the real Add maths papers in SPM haha
https://trial.spmpaper.me/?dir=SPM Sebenar%2FMatematik Tambahan (Add Maths)

[stuck rapids]

His way of speech has always been indirect

[vestal swift]

It's still borderline maths related 👀

[stuck rapids]

He told me : the same country u r from

[rancid schooner]

Are past papers for SPM available free of charge?

[vestal swift]

:)

[rancid schooner]

They should be as it’s a public exam. But seems not.

[tawdry gull]

What is form 4 & 5?

[vestal swift]

But Cambridge papers aren't free also, just that some website provide it for free

[rancid schooner]

Yes this was a poorly worded question. Very ambiguous.

[vestal swift]

Tingkatan 4 & 5

Hahah

[tawdry gull]

In terms of grades?

[vestal swift]

Basically Form 5 is SPM year

Form 4 is the year before SPM

Idk in terms of Grade tho

[rancid schooner]

6 years of primary school, 5 years of secondary up to SPM, 2 years of pre-U to STPM.

[stuck rapids]

10 and 11?

[tawdry gull]

Eh so SPM is grade 10 or 11?

[rancid schooner]

11th year of schooling

[vestal swift]

Grade 12 is A level right?

[stuck rapids]

Ah yeah yeah

12 and 13

[rancid schooner]

Yes.

[stuck rapids]

And after spm there are way too many pathways

Hahaha

[tawdry gull]

I see i see

I asked my cousin abt it

There are 3 routes?

[rancid schooner]

https://en.m.wikipedia.org/wiki/Education_in_Malaysia

[vestal swift]

More than 3haha

[stuck rapids]

U have foundation/and another other foundation programmes like mufy/ausmat /cimp

A level

Diploma

[vestal swift]

Matriks

STPM

[rancid schooner]

I should start a maths channel called A-lexel 😄

[stuck rapids]

Uec

[stuck rapids]

Waaaaa lao hahahaha

💩

[tawdry gull]

Have to make spm stpm channel haha

[stuck rapids]

A lexel

😂

[vestal swift]

STPM maths is a mix of A levels further maths and A level maths

[stuck rapids]

Not many Malaysians here hoho

[vestal swift]

But they don't have that mech component

[tawdry gull]

Oh my cousin is gonna take the uec route

[vestal swift]

Can try to see if can find STPM Math-T books

[stuck rapids]

Yeahh something liddat

[rancid schooner]

No one takes STPM any more. Previously very prestigious. Now everyone runs away. To follow other paths of less resistance.

[stuck rapids]

Wht is the difference between the two different types of stpm maths

One is T another one is like wht M ah.. Not sure

[stuck rapids]

Ofc..

[rancid schooner]

STPM used to have Further Maths but they scrapped it.

[vestal swift]

My friends take it coz it's the cheapest route, but at the expense of your time being wasted

[tawdry gull]

Got good looking chinese books over here too

[stuck rapids]

Back in my dad's days. He took fm hahaha

[vestal swift]

Coz i finished A-levels in Nov last year, they're still in form 6 now, exam dragged until June

[stuck rapids]

💩 brain power on the point

[rancid schooner]

But if you can’t afford private then it gives you a qualification equivalent to A-Level which can be used to apply to Sg, HK, UK, etc.

Can’t use foundation

[stuck rapids]

Same year kan?

Same age I mean

[vestal swift]

Save money but wasted time

[stuck rapids]

That's the difference

[vestal swift]

Yep

[rancid schooner]

Wow. So that’s where you got your mathematical brains from. What did he study at university?

[stuck rapids]

Mechanical engineering

😏

[vestal swift]

Yeah my dad also studied math haha

[tawdry gull]

Yeah that is math brain right there

[vestal swift]

Stats to be exact

[tawdry gull]

😂😂

[vestal swift]

At McMaster's or smthg

[stuck rapids]

I disappointed him hahahaa

Didn't have the confidence to take a level fm

💩

[rancid schooner]

There are some poor people out there who just can’t afford

[vestal swift]

Dunliddat future actuary eh

[stuck rapids]

That frickin 15 months programme

[vestal swift]

Yeah so the pros and cons of stpm

[stuck rapids]

Wehhh geng eh

[stuck rapids]

Haiyaaaaaa I k I k dw.. In the end I took something related to math still hohlho

[rancid schooner]

Is he a professor or something?

[vestal swift]

Nah dint rlly make use of his math degree oof

[rancid schooner]

πerrot’s gone quiet

[stuck rapids]

@rancid schooner u leh...wht was ur major

[vestal swift]

Busy hunting math books

[stuck rapids]

💩

[vestal swift]

He will say

[rancid schooner]

Wow so many Chinese books

[stuck rapids]

Bot

Yeah

Ik

[vestal swift]

"bOtS dOn'T hAvE mAjOrS"

[rancid schooner]

So if you study maths in Taiwan or China are all the terms in Chinese?

[tawdry gull]

I’m strolling around the store

[vestal swift]

Got stpm math books? XD

[stuck rapids]

He brushed that off

Just got ignored

Smh

[tawdry gull]

I’m not buying them 😂

[stuck rapids]

Yeahh I think so.. I think unis in China offer bilingual lessons.. So some foreigners can choose to study the terms in Chinese /eng

[tawdry gull]

Depends on program ofc

[stuck rapids]

But like I have met friends from the uec tong kao route

Their books were all in Chinese...maybe for their schools la

[tawdry gull]

Ya my cousin does chinese

[rancid schooner]

This is from a “junior olympiad” book for 12-13yo or something similar, found in a Popular book store.

[tawdry gull]

I even had to ask him in chinese

All these time

[rancid schooner]

The questions are quite interesting. Esp Q2.

Probably many SPM students won’t be able to work it out.

[rancid schooner]

Imagine saying binomial coefficient in Chinese.

[vestal swift]

@stuck rapids I like how he keeps denying he's Malaysian but drops all the obvious hints

[tawdry gull]

I don’t know how that is in chinese :’)

[rancid schooner]

Nowadays can get info from the web

[stuck rapids]

U an indeed interesting math soul

Compassion

[rancid schooner]

Anyway πerrot is better off trying the local food instead of trying to find proper books at the local bookstores there.

When in Sg then check out the real bookshops

[vestal swift]

For Q1, what's the rationale behind the ans?

[tawdry gull]

I was in sg kinokuniya

Have igcse books

So nice

[rancid schooner]

They should have proper maths books as well

[tawdry gull]

Yeah

Quite a lot

Notbad

[rancid schooner]

The square is the largest

Product of two numbers displaced by 1 on either side is less than the square of the middle number.

If displaced by 2, even less

Basically
n² > (n-1)(n+1) > (n-2)(n+2)

[stuck rapids]

Chinese terms are so difficult to understand..

[stuck rapids]

So u do know how to speak in chinese quite fluently right?

[stuck rapids]

Exactly this guy.. Haiyaaa

[vestal swift]

But here they are two diff numbers right haha

[rancid schooner]

That’s the “spirit” of the question. I’m sure you can easily find the common “midpoint”.

[stuck rapids]

👀

[stuck rapids]

Yeahh right but so detailed meh.. I doubt so

[rancid schooner]

Hmmm crysto displaying private chat info haha

[stuck rapids]

See this quickly hahaha

[vestal swift]

Seen

Hahah

[rancid schooner]

Q2 is more interesting. Basically the pigeonhole principle.

[vestal swift]

Waw y'all private chat so op

[rancid schooner]

Wonder how they teach that to 12-13 year olds.

[vestal swift]

Average of the two numbers?

[rancid schooner]

Yes

[vestal swift]

But for both A and B the avg is the same right

[rancid schooner]

But no need to compute that. You just know it’s the same one.

Yes

[vestal swift]

And so why B is larger ?

[stuck rapids]

Maaf encik

[rancid schooner]

If mean is M, then
A = (M-n)(M+n) = M² - n², say,
B = (M-(n+1))(M+(n+1)) = M² - (n+1)².
So A>B.

[vestal swift]

So what's n in this case

[rancid schooner]

Not required to work out the answer.

Just the concept.

M need not be an integer either.

[vestal swift]

Oh so coz the numbers in B are closer to the average, that's why B is bigger?

Oh wait

[rancid schooner]

Again I wonder how they teach that to 12-13 year olds when they probably haven’t learnt about factorising algebraic expressions etc.

A further away. So smaller.

[vestal swift]

Wait B not bigger ah

[stuck rapids]

Yeah oh

[vestal swift]

Umm 8 yr old Olympiad classes alr got permutation

Haha

I forgot 8 or 9 or 10

[rancid schooner]

so they teach them how to do it without talking about factorials, permutations, or combinations?

[vestal swift]

I rmb got ncr npr formula

I forgot alr

[vestal swift]

Haha I can't do all 3🥲

[rancid schooner]

yes, sorry, B larger as the numbers are closer to the centre

[vestal swift]

I hate number sequences

[rancid schooner]

they are fun

[vestal swift]

This is pure math right?

[rancid schooner]

yes

combinatorics

where 𝜋errot? he should give a pop-up maths demo at popular :)

[vestal swift]

So q3 how ah

Got hint anot hahah

[rancid schooner]

i was quite impressed that they came up with those questions. seemingly innocent, but requires deeper mathematical understanding.

[vestal swift]

Means my maths understanding too shallow 😔

[rancid schooner]

haha no no

[vestal swift]

I'm quite bad at detecting patterns

[rancid schooner]

but would be more curious how they would teach it to 12-13yo. and if they can understand, does that mean then can do IGCSE add maths questions on permutations and combinations?

[vestal swift]

Like those IQ tests whicj asks u to predict the next pattern

[vestal swift]

Yeah most likely got advantage

Coz I did take some Olympiad classes for two years when I was primary 3 / 4 (dint join any comps tho)

And when I went on to secondary I had absolutely no recollection of what I learned, but it was quite easy to grasp the concepts

[rancid schooner]

haha can't remember. this was some time ago.

but another interesting one was:
1/1 + 1/(1+2) + 1/(1+2+3) + 1/(1+2+3+...+10) =?

or maybe it was up to 100 or something, so that you can't use a calculator

[vestal swift]

Haih sometimes I think 9 yr old me was more clever

[rancid schooner]

or maybe they just do it mechanically. i wonder if they really understand.

[vestal swift]

So how to do this math god haha

I think learning advance math makes me less creative alr haha

[rancid schooner]

just apply your advanced maths knowledge ahha

[vestal swift]

I forgot everything after a levels 😔

[rancid schooner]

that's why you should host study session, then you'll be forced to recall 😄

[vestal swift]

But Olympiad questions like these quite hard to know which field of maths it falls under

[rancid schooner]

these are not every olympiad questions, just common sense. they really shouldn't use the word olympiad indiscriminately. it would be like calling every country or regional sports meet an olympics.

[vestal swift]

Oh wait method of differences? 😂 Hmm

I got like $1 \frac{9}{11}$?

[round siren]

doob

[rancid schooner]

that's the emergency number

[vestal swift]

Idk if I did something wrong

[rancid schooner]

show workings

[rancid schooner]

nice

so neat

[vestal swift]

So ans correct ah haha

[rancid schooner]

yes :)

[vestal swift]

Ouh

What's a more classy way to do it :)

[rancid schooner]

the same haha

[vestal swift]

Multiple summations? But idk how haha

[rancid schooner]

this telescopes nicely so is probably the easiest

[vestal swift]

Like I saw some of the prev math senpais answers had like summation within a summation or smthg

[rancid schooner]

so did you get any interesting interview questions?

[vestal swift]

Why I choose math, what I like abt math

Mainly these two math related

[rancid schooner]

any nice maths questions?

[vestal swift]

No technical questions pheww

[rancid schooner]

how disappointing

[vestal swift]

Lmao no haha thank god

Coz when he asked me what I liked abt maths, my dumbass talked abt the pi story

And I gave the wrong eq HAHAHA

[rancid schooner]

if i was the interviewer i would have asked "what interesting maths question would you ask at a maths interview?" 😄

[vestal swift]

https://youtu.be/gMlf1ELvRzc

[rancid schooner]

on infinite series?

[vestal swift]

I just recalled that I liked this video :))

[vestal swift]

Lmaooo no pls thank God you're not the interviewer

[rancid schooner]

we should ask @tawdry gull how he would answer this question. he would probably give an integral :)

maybe you might want to try this question. quite interesting. #ug-maths-physics message
@vestal swift @stuck rapids

[vestal swift]

Hard ah?

Wah 6 marks damn

[rancid schooner]

from IB. nice question.

#a2-further-maths-pure message

this is also a nice question.

[stuck rapids]

Don't want more torture rn hahahaa

Most of the time it is the p and c questions which require thinking skills

HAHAHAHA

[rancid schooner]

private and confidential questions?

[rancid schooner]

it's fun! just for some entertainment.

[stuck rapids]

u see it the way u see it AHAHAH

[vestal swift]

this one big answer ah

like 10 to the power of 10 holy shit

maybe my ans wrong lmaoo

[rancid schooner]

how did you work it out?

[vestal swift]

idk if it's correct

without restrictions - 4 letters tgt - 3 letters tgt

not sure abt the 3 letters tgt part

[rancid schooner]

show workings

[stuck rapids]

u r scary encik

HAHAHA

[rancid schooner]

was wondering if there is a systematic way of solving similar types of problems.

[vestal swift]

$14! - 4! \times 10! \times 11 - ( 3! \times 10! \times 10 \times 2 + 3! \times 10! \times 9 \times 9 )$ ?

[round siren]

doob

[rancid schooner]

looks nice

can check by using the additive method

[vestal swift]

what's thatt

[rancid schooner]

counting the number of permissible arrangements

instead of all less non-permissible

[vestal swift]

i forgot how to do this alr

it's harder coz they can be spaced by different amounts right

[rancid schooner]

yes. is there a way ot making it easier?

standardizing it?

think about it

[vestal swift]

not rlly sure tho, all this while i was using the other method

[rancid schooner]

in the meantime try the other question on complex numbers :)

[vestal swift]

where this

i can't even do the 1,3,9,27,18 eesh

[rancid schooner]

that's not a logical question. i can't remember how to do it either haha.

[rancid schooner]

#ug-maths-physics message

[vestal swift]

ah shit i'm terrible at proving

proving + complex = too high class for my brain

[rancid schooner]

haha

the complex number question is fun because it looks quite simple

[vestal swift]

it looks HARD WDYM LMAOOO

[rancid schooner]

and can be proven by brute force (just substitute a+ib, etc)

[vestal swift]

so z = r(cos theta + i sin theta) ?

[rancid schooner]

but the challenge is to find a neater and more elegant solution

[vestal swift]

i forgot alr

coz we dunno the coordinates of z right

[rancid schooner]

yes

the identity looks really neat

[vestal swift]

or just treat it as a vector ah?

[rancid schooner]

i was pleasantly surprised

[vestal swift]

zw is like dot product?

or just multiplication

[rancid schooner]

but then how do you cross product two complex numbers?

[vestal swift]

IDK HAHA

[rancid schooner]

try and see haha

[vestal swift]

if dot leh haha

[rancid schooner]

that too haha

[vestal swift]

wait what's the bar thing

can't rmb

OH

CONJUGATE ZIT?

[rancid schooner]

the bar is where you order cocktails and drinks :)

[vestal swift]

wait so w can't be r right it has to be some other letter

wait so, is my barcode ans correct or wrong :(

[rancid schooner]

hmmm looks different

[vestal swift]

show moi the right way por favor

[rancid schooner]

haha think about it over the weekend

try the complex number question first

[vestal swift]

This ok?

My proving kinda rusty

[rancid schooner]

Nice 👏🏻

[vestal swift]

How would you do it :)

[rancid schooner]

Let’s see if πerrot has an alternative method. :)

[vestal swift]

oh wait coz the area is something like cross product right

[rancid schooner]

Yes. Half of it.

[vestal swift]

Sus

Idk hahahahaha

[vestal swift]

OH WAIT if i change the 9 to 10 ?

$14! - 4! \times 10! \times 11 - ( 3! \times 10! \times 10 \times 2 + 3! \times 10! \times 10 \times 9 )$

[round siren]

doob

[vestal swift]

$8.382528 \times 10^{10}$

[round siren]

doob

[rancid schooner]

Haha yes. It was totally illogical.

[rancid schooner]

Please explain

[vestal swift]

still wrong answer ah

[stuck rapids]

i m trying to solve too

hahaha

is it even repetitive

[vestal swift]

as in what ah

[rancid schooner]

No repetition

[stuck rapids]

like the letters and digits can be repeated

that one susah la

[vestal swift]

@rancid schooner

the suspense is killing moi

[stuck rapids]

https://tenor.com/view/im-fine-little-boy-crying-gif-15238441

[vestal swift]

can do ah

[stuck rapids]

not sure also hHAH

[vestal swift]

where art thou alexV mathgod

[rancid schooner]

Official answer is 7.66 x 10^10

[vestal swift]

Shit

:(

[rancid schooner]

How did you get your solution?

[stuck rapids]

hmmmm

[vestal swift]

I dunno Liao

[stuck rapids]

this is wht i did

[vestal swift]

same ans?

[stuck rapids]

14!-12 times 4P3 times 11!

[vestal swift]

waww

[stuck rapids]

🤣 not the same also

HAHAH

whtever haiyaaaaa

[vestal swift]

but closer

B)

oh wait

ah should've used 4! instead of 3! eesh

but idk yet haha

wait nvm haiya still 7.74 there

[stuck rapids]

🤣 combinations be the worst possible one out there

[vestal swift]

ikr :(

OH WAIT

[rancid schooner]

0 is a digit as well

[vestal swift]

@rancid schooner AY?

[rancid schooner]

👏🏻👏🏻😄

[vestal swift]

SMH SO CARELESS

[rancid schooner]

Any other method?

[vestal swift]

How did u do ittt

[rancid schooner]

How did crysto do it?

[stuck rapids]

Ohhhhhhhh

[stuck rapids]

Macam tu

[tawdry gull]

Going to another popular again

In SKM

[rancid schooner]

Any maths books there?

[tawdry gull]

Yes but school

Like a level or igcse

& spm stpm

[rancid schooner]

Any junior “olympiad”-style books?

[tawdry gull]

Don’t think so haha

[rancid schooner]

You should give a pop-up maths demo there 😄

[vestal swift]

This in jb also?

[tawdry gull]

Yes, all my pics from jb

[vestal swift]

Enjoying the food so far? :)

[stuck rapids]

hahahhaa popular haul

[rancid schooner]

What’s SKM?

[tawdry gull]

Yepp

[rancid schooner]

Show food pics in #chat-lounge

[tawdry gull]

Whoopsies

Didn’t take food pics

😂😂

[rancid schooner]

Next meal then 😄

Bought any maths books?

[rancid schooner]

#a2-math-p2-p3 message
Try this. Nice question. @tawdry gull @vestal swift @stuck rapids

[tawdry gull]

Not a single one this time

But i had a good time going to popular

[vestal swift]

Wait which one?

PPT?

[stuck rapids]

Which one?

[rancid schooner]

On complex numbers. @vestal swift @stuck rapids

[rancid schooner]

What is your opinion of the standard of the maths taught in the country?

[tawdry gull]

Better than indonesia’s

Of course I’m comparing each national maths

[vestal swift]

Ini?

[rancid schooner]

Yes

[stuck rapids]

🤣

[vestal swift]

Tutee having exam this week so later i'll do ahhahah

[swift zinc]

Q3 and Q4 are still giving me a stroke

and the submission for this is today 😩

[rancid schooner]

Tutti is when all instruments in the orchestra play at the same time

[swift zinc]

@tawdry gull sorry for pinging again but any more hints if youre free 🥺

[tawdry gull]

Can u send the pics again?

[swift zinc]

yep alright

in 3a when they say the function given in (6) they mean this

[tawdry gull]

@swift zinc i think i might to actually read the actual paper for 3a

[swift zinc]

sure ill send it

[tawdry gull]

But my god the questions are so complicated HAHAHA

[swift zinc]

ik for some reason they gave us the hardest assignment thats ever existed in this unit

and its worse coz this is a 2nd year unit and im a 1st year student

[tawdry gull]

For 3a u just have to find the eigenvalues normally using det(A-λI)

[tawdry gull]

My god good luck bro

λ1 λ2 λ3 corresponds to the constant term of the characteristic eqn

Same goes for the the λ1 + λ2 + λ3

For 3b i mean

[swift zinc]

whats the coefficient matrix referred to in the question i dont get that

[tawdry gull]

If u check the paper

There’s a matrix above (6)

[swift zinc]

ohh ok

[tawdry gull]

Yepp

Try doing 3c urself first, it has to do with all the coefficients in the char eqn as real numbers

[swift zinc]

such a scary looking matrix 😭

[swift zinc]

yep alright

[tawdry gull]

All are constants :) so its aite

Just with many dumb symbols

[swift zinc]

also for Q2c, how do i prove the group is isomorphic

[rancid schooner]

Eminem studying fluid mechanics? Mechanical engineering or applied maths?

[swift zinc]

oh no this is just abstract algebra and they included a reference to a fluid mechanics research paper

[rancid schooner]

I see. What is your major then?

[swift zinc]

Data Sci is my first major and Math is my 2nd

[rancid schooner]

Nice

Sounds interesting

[swift zinc]

yes it does :)

tho i might just go with the calculus route for math and let go of algebra altogether

[swift zinc]

i think ive got 3a and 3b, can you help me with q4 now

im sorry for asking so many times

[tawdry gull]

Sure when i get bacj

I’m in aeon mall rn

[rancid schooner]

Any more bookshops?

[swift zinc]

ah alright, ill prolly be asleep, so just ping me and ill read tomorrow

thank you so much

[tawdry gull]

Okay sure

[tawdry gull]

No popular in aeon

[stuck rapids]

ehhh siblings xD i m from actuarial sci

[rancid schooner]

So crysto is a sibling of eminem

[stuck rapids]

😂 Bruh

Data Sci is a sibling of actuarial Sci

👀

[vestal swift]

Wah how many mall you go to liao hahha

Ya plan to go to all the malls in johor? 😂

[tawdry gull]

Bu na me duo liao

Only sutera skm & aeon

😂😂

[rancid schooner]

Did you help your relative with his/her maths?

[stuck rapids]

Jb right? Hahaha the aeon there is like rly big

[tawdry gull]

In chinese yes

My cousin’s mother tongue is mandarin

So i had to help him with his olympiads maths in mandarin

[rancid schooner]

Wow

But as a student in Malaysia he should be conversant in English

[stuck rapids]

like as in the terms are in mandarin too rite?

[tawdry gull]

I tried my best yes

He understand a bit of English

So terms that I don’t know in mandarin

[stuck rapids]

that's true..but based on my experience most still stick to mandarin speaking (like fully mandarin)

[tawdry gull]

I just say in english

[tawdry gull]

His school is the chinese one

So his English and melayu isn’t that great

[stuck rapids]

🤣 in fact many of my classmates are from duzhong..and i speak in mandarin usually...

[tawdry gull]

Damn

Ur in international school right?

[stuck rapids]

yeah i was from an int school

but i graduated from a chinese primary school

[tawdry gull]

Oooh i see

Yeah malaysia quite different than education system here

I say u guys have better education system

[stuck rapids]

confusing in a way HAHAH

[tawdry gull]

Indo has

1. National schools
2. National+ schools
3. International schools

[tawdry gull]

Ya a bit, but it still comprehensible la

[stuck rapids]

ohhhh i see i see

national and national plus

[tawdry gull]

Yap

[rancid schooner]

So you’re getting him interested in doing a Maths degree? Is he doing A-Levels?

[stuck rapids]

ermmm most chinese school students do uec, which is equivalent to a levels

[rancid schooner]

Some switch out to do A-Levels

Does πerrot’s cousin know that he is πerrot? 😄

[stuck rapids]

👍 yeah yeahh hahahaa

[rancid schooner]

Have you tried the complex number question?

[stuck rapids]

🤣 no laaa encik..i have assignments to work on rn

[rancid schooner]

It’s not very difficult

[vestal swift]

National + ? This piqued my interest haha. For smart students?😂

[rancid schooner]

Please don’t call me that. Sounds weird.

[stuck rapids]

Yeah ik.. I have done it several times

[stuck rapids]

Encik Alex atau cikgu Alex..? Tuan Alex?

Which one u want

[rancid schooner]

Just Alex :)

nice identity. give it a try :) just came across it again.

[vestal swift]

Where is this question from?

Got stuck :(

[vestal swift]

Idk if this is the correct way? It’s more of trial and error for me :(

[vestal swift]

Ok I regret scrolling through the a2 maths channel, it's even more chaotic than here 😂 😂

I rmb doing this q before but I forgot the ans

[stuck rapids]

Later do hahaha.. Have I tried this b4? I think yes?

[rancid schooner]

Nice

[rancid schooner]

NZ Scholarship Calculus exam

Something like A-Level +

Anyone from NZ here?

[stuck rapids]

tf is this

AHAHAH

[rancid schooner]

It doesn’t make sense?

[stuck rapids]

no laaa (but ur one is legendary shortcut) hahahah sifu sifu

@rancid schooner which pen do u use, mr bot

[rancid schooner]

This was probably Faber-Castell Loom fountain pen. With Parker Quink Blue-Black ink.

[stuck rapids]

no wonder..cuz the texture looks like it too

[vestal swift]

What identity is it in the first two rows ah

[rancid schooner]

Yes it’s very nice. You should try writing with one. It inspires the user to come up with imaginative shortcuts in solving mathematical problems 😄

[rancid schooner]

It is trivial and the proof is left as an exercise for the reader 😄

[vestal swift]

Identity got any special name?

[rancid schooner]

Start with cos² / (1-sin²) = 1, factorise, and cross multiply

[rancid schooner]

Not that I know of

[stuck rapids]

So legendary

[rancid schooner]

Then use a/b = c/d = (a+c)/(b+d).

[stuck rapids]

Hahahahdjhaa

[vestal swift]

Then how to get the (1-s+c)/(1+s+c) ah

[stuck rapids]

Definitely doesn't matter that much

It is the brain power which matters

[vestal swift]

People too big brain liao

[rancid schooner]

Then use a/b = c/d = (a+c)/(b+d).

[rancid schooner]

Have you used one before?

[stuck rapids]

If only I can steal some of his brain

[stuck rapids]

No ehh.. Only tried once.. But it suits people who have already gotten used to cursive writing

[vestal swift]

Maybe every time we react with "😄"

He always react with "😄"

[stuck rapids]

:D

[rancid schooner]

But that was not written in cursive.

[stuck rapids]

Show us ur handwriting hahaha

[rancid schooner]

Anyway are both of you convinced of the proof now?

[stuck rapids]

Not math ah

[vestal swift]

Crysto maybe he's secretly a phd maths professor or something 🤯

[rancid schooner]

No no. Just trying to learn.

[rancid schooner]

The word “and” is written in the answer

[vestal swift]

Coz if they have the same ratio you can just add two of them tgt and it doesn't change the ratio? 🤡 🤡

[stuck rapids]

There is a possibility

Could he be a math professor in some top unis

😂

That's how he got so many ideas and sample questions

[rancid schooner]

Then he won’t be here

[vestal swift]

Math professor testing us

😄

[rancid schooner]

Well try to prove that and see if it’s true

[stuck rapids]

Too short.. I needa see something longer hahaha

[rancid schooner]

Sample questions are from the web

[stuck rapids]

Maybe like MDragon.. U r here for fun

[rancid schooner]

Haha it’s the same

[stuck rapids]

MDragon isn't active tho hahaha.. But like

[vestal swift]

Can be proven ah :(

[rancid schooner]

Yes why don’t ask him to come back?

[stuck rapids]

He is still here

Maybe he doesn't have this role or smth.. So he isn't here in the channel hahaha

[rancid schooner]

Well you shouldn’t take things at face value in maths

[vestal swift]

Coz if both have the same ratio then like one is the "simplified" version of the other, then adding the denominator and numerator of the two ratios is like basically multiplying each the denominator and the numerator by 2? So the ratio doesn't change?

[rancid schooner]

1/2 = 3/6 = (1+3)/(2+6)

[stuck rapids]

Wtf is this identity

[vestal swift]

My logic kinda weird

Hahahha

[stuck rapids]

Is legit true

[rancid schooner]

123648 identity? 😄

[stuck rapids]

2/3=4/6=(2+4)/(3+6)

[vestal swift]

Because it's like u take 2×2/3×2, so ratio still same ?

[vestal swift]

And this one basically 1×2/2×2 ?

[rancid schooner]

Can it be proven algebraically?

[stuck rapids]

Professor vibes

👀

[vestal swift]

I think I know why he keeps claiming he's bot

He even puts himself in the same category as the other bots

😂 😂

@stuck rapids 😂 😂

Non-verified bot

Sus 👀

[rancid schooner]

Hmm how come both of you don’t show up ?

[vestal swift]

Coz we are real human beings :)

[rancid schooner]

Is he still active on the other server? Ask him to get a role.

[stuck rapids]

Is it cuz of the roles?

Cuz he doesn't have another roles.. Apart from the subjects roles

Extracurricular roles

[stuck rapids]

Finally reacted with another emoji

[stuck rapids]

I will ask him to hahahaa

[rancid schooner]

Anyway some of these Australia/NZ A-Level equivalent maths questions are quite creative.

[rancid schooner]

Nice. What server is that?

[vestal swift]

I thought Australia is high school certificate?

Or like ausmat?

[rancid schooner]

Yes NSW HSC Extension 2 Maths

[stuck rapids]

Wace it is?

[rancid schooner]

Don’t know about that.

Different states have different exams

But A-Level questions more well-calibrated

[stuck rapids]

didnt know hsc is a new zealand board hmm

[rancid schooner]

No that’s Australia for NSW.

NZ is Scholarship Calculus

[stuck rapids]

owhhhh

[rancid schooner]

So are you convinced of the validity of the proof?

[vestal swift]

Yes but dunno how to prove with algebra

[rancid schooner]

I mean the validity of the proof of the original question - the trig identity.

[vestal swift]

Yea i guess haha

How to start with the algebra proving? 🤔

[rancid schooner]

Haha that’s good. Did you like the proof?

[vestal swift]

Too elegant for my small brain 😄

[rancid schooner]

😊

[swift zinc]

@tawdry gull

[tawdry gull]

Oh god right

HAHAHAHAH

I had acupuncture last night thats why i cudnt help

[swift zinc]

oh damn

sounds cool

[tawdry gull]

I had needles on my head brau

[swift zinc]

correction: sounds scary af

[tawdry gull]

😭😭

Ok but, no 4 is kinda hard to do

I dont have an idea where to start

Esp i dont study stochastic matrix

[swift zinc]

oh welp

[rancid schooner]

Wow why acupuncture?

[tawdry gull]

My left leg has problems

[rancid schooner]

Hope you get well soon

[tawdry gull]

Thankss

[rancid schooner]

Visiting any universities?

[main topaz]

I'm starting to lose count of how many times alex has sent this question lmao

[rancid schooner]

Only once before. I mentioned that I came across it again. Others might be similar but not the same one.

[stuck rapids]

Ikr 😂

@rancid schooner random question but.. Does a bot have a love life.. I m curious

||Evil laughing HAHAHAHHAHAHA||

[swift zinc]

Lmfaoooo

@tawdry gull I submitted my assignment thanks for all your help

[idle rain]

Gave +1 rep to The_Pierrot#7889

[swift zinc]

You should get like 5 reps

[tawdry gull]

Np my guy

[tawdry gull]

😂😂

[tawdry gull]

With all those math, maybe not

[stuck rapids]

bet he would say "my lover is maths" 💩

[rancid schooner]

Haha yes that’s a good answer 😄

[vestal swift]

Married to maths 😂

[rancid schooner]

Another interesting question from NZ:
Given that p, q, r > 0 and p+q>r, show that p/(1+p) + q/(1+q) > r/(1+r).

[rancid schooner]

A quiet day here

[vestal swift]

Yea haha wasted half a day to renew my passport but still couldn't do it :)

[rancid schooner]

Now you can relax with a nice maths problem

P2/P3 channel very busy today

[stuck rapids]

Wa-

[vestal swift]

Immigration department work ethic best in the world 👍

[vestal swift]

Lmao there also become casual chatroom liao

[main topaz]

wait only half? it took me 2...

a whole day was wasted waiting in lines and at the end the server crashed so had to return the next day

[vestal swift]

I'm too lazy to type out the shit process I went through today but I can type out a MF 1000 word essay to show how pissed I am

[vestal swift]

Mine was like they initially allowed an online appointment, so I booked one for 1 June in April, then they dint allow it so it's alr invalid, then my dad asked the centre on May 13 if we could walk-in they said yes, and TODAY we went there they said no and we had to do an online renewal but the website had PROBLEMS

That's just HALF OF what I went through today

[main topaz]

sed

[stuck rapids]

Hahahahaha Malaysia efficency

[rancid schooner]

Acid is from the same country as doob and crysto?

[stuck rapids]

@rancid schooner also u

[tawdry gull]

Finally back to jakarta

Both malaysia & singapore are fun

[rancid schooner]

Nice. Very short trip.

Visited any bookshops in Singapore?

[main topaz]

Nop somewhere worse

[main topaz]

Further P2 session now 👉👈

[tawdry gull]

just kino

[tawdry gull]

😩

[main topaz]

Thank you love you

[rancid schooner]

Nice. Bought any books?

[tawdry gull]

for my friend only

chainsaw man manga

[rancid schooner]

That doesn’t sound like a maths book 😄

[vestal swift]

Use desmos to create manga art :)

[tawdry gull]

never said i bought math books :)

[swift zinc]

That's a good manga

[rancid schooner]

Chain rule 😄

[rancid schooner]

Did you come across any interesting maths books?

[tawdry gull]

not much

[vestal swift]

Yeah Malaysia too crap

[rancid schooner]

Bookshops in Sg

[rancid schooner]

https://youtu.be/fCKJmVkH6Po

For those who like music and maths

[stuck rapids]

Host a study session @rancid schooner

[rancid schooner]

You do it. I will attend :)

[stuck rapids]

No instead uno reverse

[rancid schooner]

So when is it?

[rancid schooner]

@stuck rapids plays music?

[stuck rapids]

I don't hahaga

[rancid schooner]

so which paper or topic will you be doing?

[vestal swift]

Btw random q, if it's simplifying an expression, final ans can be in expanded form or factorized form right

[rancid schooner]

Factorised form

[stuck rapids]

i m confused

🤣

[rancid schooner]

For your class :)

[stuck rapids]

Wth

[rancid schooner]

Then can write in resume hosted A-Level maths study session on ZNotes server :)

[hushed dock]

You get certificates for hosting sessions

Which can definitely go in Yr resume lol

[main topaz]

starts holding sessions to strengthen common app

[rancid schooner]

So that’s a good reason to host a session. @stuck rapids @vestal swift

[vestal swift]

doob is too noob lah senpai

[rancid schooner]

No one knows who you are anyway

So even if you make mistakes it’s ok

[vestal swift]

Why you keep insisting for me and crysto to host ah hahaha 😂

Got plenty of other genius people here also :)

[rancid schooner]

because both of you have neat handwriting 😄

[vestal swift]

when i panic it can be the most chaotic crap you've ever seen :)

[rancid schooner]

you won't be panicking during a study session :)

[vestal swift]

Panic teaching :)

[rancid schooner]

try

[vestal swift]

so ans as second last row shd be ok right

[vestal swift]

maybe in the future hahah

[rancid schooner]

second last row looks more simple than last row

what's this anyway

[vestal swift]

Nah just finding questions for tutoring

[rancid schooner]

Try this:
Factorize x³+y³+3xy-1

[vestal swift]

Too hard for a form 2 student lah hahah

[rancid schooner]

But not too hard for you 😄

[stark wave]

It's actually great experience! It's not very high stakes so you have room to practice

[stuck rapids]

Yeah Mann.. Sry for late replies

I m on doob's side

Doob does tutoring? Hohoho

[stark wave]

Cuz this confidence of talking to people takes time and effort to build up and pays off everywhere

When I did interviews for ZNotes contributors I was so extremely nervous at the beginning

But now it's really easy and chill

[vestal swift]

1 to 1 only haha I only have one student 😂

[vestal swift]

Well I’m quite anxious that I’ll teach the wrong stuff😂😂

I always say the wrong thing irl tho 😢

[stark wave]

You need to live and learn, and trust me ZNotes people are very nice, as you can see Alex is v supportive

[stuck rapids]

Yeahhhh me too doob

😂

[hushed dock]

It's just a server nth huge

[rancid schooner]

#a2-further-maths-pure message
@tawdry gull how would you solve this?

[tawdry gull]

putting it here so its easier to see

hmm

either turn it into vectors or straight up calculate using complex numbers

just a rough guess ofc

[rancid schooner]

Do give it a go when you have some time

[round siren]

Acid

[rancid schooner]

Yes

[verbal nova]

I try now

Ez

Shit

[main topaz]

uhh @rancid schooner what if you solve this question without using the arguments?

would it still be valid?

[verbal nova]

OH MY GOD I MADE A MISTAKE

:(

[main topaz]

sadge

[rancid schooner]

Sure can solve it any way as long as you get to the answer

Presumably

[main topaz]

,rotate

[rancid schooner]

Nice

[verbal nova]

i made a sign mistake

[main topaz]

thx

[idle rain]

Gave +1 rep to AlexV#1811

[verbal nova]

damn

took me a whole page for mine :/

[main topaz]

ahh yes the sign change, biggest enemy of a mathematician

[rancid schooner]

Show

[verbal nova]

lemme see where I made error and fix first

[main topaz]

how did u do it?

[rancid schooner]

Let’s wait a bit and see if πerrot posts a solution

[verbal nova]

After seeing acid’s solution, i feel like a caveman solving maths

[main topaz]

nice

[verbal nova]

i thought of using the formula you used, but I never used it personally so I stuck with 1/2 ab sin(T)

[rancid schooner]

Nice

[verbal nova]

❤️‍🔥 thanks

[idle rain]

Gave +1 rep to AlexV#1811

[tawdry gull]

alex got a free rep for giving a question

[verbal nova]

biggest uno reverse

[hushed dock]

Lol

[rancid schooner]

Thanks

[idle rain]

Gave +1 rep to The_Pierrot#7889

[tawdry gull]

I GET A FREE REP FOR NOTHING

IS THIS LEGAL?

[tawdry gull]

Thanks for the rep

[idle rain]

Gave +1 rep to AlexV#1811

[tawdry gull]

IM DONE

[main topaz]

lmaooo

[hushed dock]

😂

Reps can be taken away so dw

[rancid schooner]

πerrot posting an answer?

[tawdry gull]

not for now

[main topaz]

yikes

[tawdry gull]

im interested in reading this book i just got

[tawdry gull]

WE BARELY HAVE ANY, DONT PLS

😭

[hushed dock]

Haha

I won't

[main topaz]

name?

[rancid schooner]

By which mathematician?

[tawdry gull]

🙏 😊

[tawdry gull]

not a mathematician

yoko ogawa

the housekeeper and the professor

[rancid schooner]

What did they do?

[tawdry gull]

write novels

she's a writer

[main topaz]

manga>novels

[tawdry gull]

i agree

[rancid schooner]

I mean the housekeeper and the professor. Did they errr solve some simultaneous equations? 😄

[tawdry gull]

my friend recommended me this book