proof

[slim bronze]

would you lose marks if you did the highlighted working out on paper in exam?

[slim bronze]

<@&791435371564892232>

[tawdry torrent]

No

[urban tusk]

Ur handwriting is rlly nice

[slim bronze]

it aint mine lol its a MA haha

mine is hit lol thats so funny

i am dying of laughter

[urban tusk]

WHAT

😔😔😔

[slim bronze]

stil thx tho

[urban tusk]

Wait send

[slim bronze]

i appreciate teh compliment that wasnt meant for me 😂

[slim bronze]

?

send link to ma?

[urban tusk]

Send like ur handwriting

Ill be the judge

[slim bronze]

oh hell naw

i am here to get roasted

not

[urban tusk]

Nevermind that tells me enough

Yea i take it back

[slim bronze]

hahahahahaha

nah no taking back no wlol

@urban tusk how about you show me your handwriting

and i will jugde it

[urban tusk]

💀no

[slim bronze]

"nevermind that tells me enough"

😂

[urban tusk]

Shut up 🤓

Smh

[slim bronze]

haha

[urban tusk]

Using my own quote against me😔

[slim bronze]

why is this so funny lol

[slim bronze]

life be doin that sometimes

[urban tusk]

Its karma

[slim bronze]

yo btw how u finding yr 12

[urban tusk]

Its easy stuff rn so its good

[slim bronze]

what sub

[urban tusk]

Wby

Maths fm phys

[slim bronze]

oh lucky my school didnt offer fm so had to take economcs instead

but basically same subjects

[urban tusk]

Oh nice

I wanted to take econ until i discovered its only essays

And not much maths

[slim bronze]

ngl yr 12 was kinda shit for me cuz i didnt revise enough and now i am trying to be better

[slim bronze]

econ is acc so good

i would have dropped physics to take fm

physics was a pain in the arse

[urban tusk]

The exam timing scares me cuz ur meant to write a lot

For econ

[urban tusk]

Yh but 😔

[slim bronze]

very true but what did u get in eng gcse?

[urban tusk]

9

Majority of my subjects was like heavy writing

[slim bronze]

bruh then u shouldnt find timing that hard

[slim bronze]

how u scared of teh essay then???????????//

sounds like a excuse

[urban tusk]

💀

Ok dont try to be smart

[slim bronze]

wdym?

[urban tusk]

Gcses is nothing compared to a level tho

[slim bronze]

i am just spittin facts

econ is just better knowledge plus eng gcse

[urban tusk]

So ill have to write more and faster & i cant do that

[slim bronze]

if u can get 9s in eng that structure is not a issue

[urban tusk]

Are u gonna do it in uni

[slim bronze]

nope going into finance

[urban tusk]

Oh classic

[slim bronze]

/accounting

[urban tusk]

Fair enough good luck

[slim bronze]

wbu any plans yet

[urban tusk]

Maths

Most likely

[slim bronze]

any specfic carrer with maths degree?

[slim bronze]

i would have done maths but i am doing DA

so maths is not a choice

[storm belfry]

Yk the best way to do this is to put if and only if symbols after each line of working

[urban tusk]

Research

Or if that makes me too poor then cryptography

[slim bronze]

wdym

also that is MA not my working

[slim bronze]

reasearch in what field

[urban tusk]

I like prime numbers so probably number theory

[urban tusk]

Damn good luck

[slim bronze]

very unique

go for it bro

[urban tusk]

Lol not rlly

Actually maybe

More ppl do research in applied stuff cuz of funding

[slim bronze]

i mean i have never heard of it

[urban tusk]

Not enough funds for pure research

[bold fossil]

oh wow

u wanna do phd?

[urban tusk]

Yep

[slim bronze]

i mean its also as pure is not really applicable irl i think

pure is most fun topic is maths

[urban tusk]

True

[slim bronze]

but not most applicable

[urban tusk]

But still number theory is used in cryptography still 😔

Justice for number theory

[slim bronze]

lol becoem president and make the justice happen urself

[slim bronze]

what do the arrows mean

[storm belfry]

If and only if

[slim bronze]

and what is that upside down A at the end

[storm belfry]

For all

[slim bronze]

so is that full marks?

answer

[storm belfry]

If A imples B
AND
B imples A

Then A is true if and only if B is true

[storm belfry]

Yeah

[storm belfry]

This is also full marks

Just is more time consuming

But probably do what ur teacher tells u to do

[slim bronze]

do u have to metion thos arrows(ifs)

to get full marks

[storm belfry]

Without the arrows is completely wrong

The if and only if symbol is necessary yeah

[slim bronze]

is there any video or link to where someone does more questions with these ifs statement

as i never thought i would be doing if statements outside computer science lol

[storm belfry]

Without the arrows they'd just be one directional implications

So that would get 4a/b + b/a ≥ 4 imples (2a-b)² ≥ 0 which is NOT sufficient to imply the first statement is true

[storm belfry]

The method u use is fine and its what 99% of people do

[slim bronze]

i like the method u did

[storm belfry]

This is more of a time saving thing which is technically correct but also technically not on the spec (i don't think)

[slim bronze]

cuz i find the first method tottally opposite of what i normally do

[slim bronze]

wait so is it possible for examiner to cut marks ?

[storm belfry]

You have to be careful with that method cuz it's not always true that everything is if and only if

[storm belfry]

It probably gets sent to the head examiner

Mathematically it's correct

Idk if its "Edexcelly" correct

[slim bronze]

could u give a example where u could not use this

if u dont mind

[storm belfry]

A super simple example

Question: Prove 0 = 1

Line1: 0 = 1
Line2: 0×0 = 1×0
Line3: 0 = 0

The issue with the above is that Line 1 implies Line 3 BUT Line 3 does NOT imply Line 1 (in other words Line 1 is NOT true if and only if Line 3 is true)

[storm belfry]

With this

Line 1 implies line 2
Line 2 implies line 3
Line 3 imples line 4

Line 4 implies line 3
Line 3 implies line 2
Line 2 implies line 1

Hence
Line 1 is true if and only if line 2 is true
Line 2 is true if and only if line 3 is true
Line 3 is true if and only if line 4 is true

Hence line 1 is true if and only if line 4 is true so line 1 implies line 4 and line 4 implies line 1

Line 4 implies line 1 is exactly what we want

[slim bronze]

hmm i see what u mean but also i assume that every question in e
dexcel maths for this type of proof would be reversible so we can do the method as shown in the MA. so i think the if statement should work in that case.

[storm belfry]

Yeah in the exam questions generally speaking they'll be reversible yes

Generally speaking

[slim bronze]

i will just confirm with my teacher to see if its "edexcel " acceptable tho

thx for the help tho

[storm belfry]

Np

[tawdry torrent]

tmua flashback