AQA 2021 Paper 2

[hollow talon]

Good

[topaz shell]

@silver star

I better hear good news

U been revising bares

[outer parrot]

BRO MECHANICS WAS A HIT OE MISS

[indigo quarry]

Umm

The paper gagged me up

[indigo quarry]

I agree

How tf do I do that contradiction one?

I just straight up copied the other question

Was like k meant to be an integer ?

[outer parrot]

Bro it was 4-x

I copied it

[indigo quarry]

My friend said +

[outer parrot]

I lost like 15 marks on those mechanics questions

[indigo quarry]

I copied it too

[outer parrot]

I did one or the other

[indigo quarry]

Just realised I got it right some how

[outer parrot]

Did you do +

[indigo quarry]

What did u put for the one marker?

[indigo quarry]

I don’t remeber

[outer parrot]

I waffled bro

[indigo quarry]

Same

The last mech question was wierd ish

[outer parrot]

I didn’t get the last question

[silver star]

Loving the paper

[outer parrot]

It was asking for coefficient of friction

[silver star]

I think this paper is better than paper 1

[outer parrot]

100%

[silver star]

1

[outer parrot]

I think I’m going to be capped at a B

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😭

[indigo quarry]

Jokes

[silver star]

It said 0 to 1

[indigo quarry]

It was alright not good

[indigo quarry]

For what?

[silver star]

When you sub 1 into the whole thing

It gives that equation

[outer parrot]

I did so shit in mechanics part

[indigo quarry]

Mechanics want even bad like I did all of them without a single diagram

[outer parrot]

I didn’t know what to do for the 5 mark perpendicular question

[indigo quarry]

Wait what?

[outer parrot]

My friend said it was easy

[silver star]

I drew some lovely trees

I think I lost probably 10 marks

[outer parrot]

What did you get for the trig

[indigo quarry]

Same

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0.2

Or 0.4 I can't rmb which one

[outer parrot]

Root 20/30

[indigo quarry]

0.2

[silver star]

What was the trig

I can't rmb that qs

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YAYYYY

[outer parrot]

The first 6 marker exact value for sin

[silver star]

Got it correct then

[indigo quarry]

What were u saying sub 0 to 1 into

[silver star]

Yah

√2/3

[indigo quarry]

Yeh

[silver star]

The coefficients friction is 1

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Yeh

[silver star]

So it gives -R +50gsomethint 60

+T

[indigo quarry]

Yeh

[silver star]

= 50a

T is the 80g-80a

I think

Or 80a-80g

[indigo quarry]

It said it was 1?

[silver star]

One of them

[kindred grove]

Same

[indigo quarry]

Is this for the one marker?

[kindred grove]

Only question I couldn't do

[silver star]

No but because you are looking for the minimum acceleration

[indigo quarry]

That wasnt bad

[silver star]

And since F is directly proportional to a

And F= coefficient x R

So when coefficient=1

It gives the minimum

[outer parrot]

I’m 100% capped at a B

[silver star]

Same

[indigo quarry]

I did that but I didn’t explain it lol

[silver star]

Also

The geo sequence one

I fucked up on that one

120 months

[indigo quarry]

For the multiple choice about the graph one

[outer parrot]

120 months HUH

[kindred grove]

That sequence was a beautiful question

[indigo quarry]

What was ur option

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YEEE

[silver star]

It said 12 years

[silver star]

What was it

I can't rmb

[indigo quarry]

Like the speed time graph

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Wait what was the options

[outer parrot]

I SAID ACCleeation is positive

[kindred grove]

I said the acceleration changes instantaneous

[indigo quarry]

Yeh

[silver star]

I put that

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Acceleration is zero too

[silver star]

Acceleration can be 0

Yahh

[indigo quarry]

Zero isn’t positive

[outer parrot]

Well I lost 1 more mark

[indigo quarry]

Acceleration changes instantaneously from whatever value to zero

[outer parrot]

I lost like 20 marks on mechanics

[indigo quarry]

So it was c

[kindred grove]

Dw you can recover with stats

[indigo quarry]

The force one about finding a and b

[silver star]

What was that one

Also can't rmb

All I rmb is the apples

[indigo quarry]

What about the force one finding. A and b

[outer parrot]

Bruh o thought why is it so easy

[silver star]

I drew an apple too

[outer parrot]

11.5?

[indigo quarry]

Yeh

[silver star]

What A and B

Did I miss a page

[indigo quarry]

I left it as fractions lll

[silver star]

😭

What

[indigo quarry]

Tf

[silver star]

What was the A and B

[kindred grove]

Are you talking about equating the forces

TO acceleration

[indigo quarry]

I swear innit I thought it was so easy for them marks threw me offf

[silver star]

Ehat

What

[indigo quarry]

Yeh

[kindred grove]

I did not get fractions for that

[silver star]

Guys

What a and B

[kindred grove]

2 forces given with unknown a and b

And then an acceleration

F = ma

[silver star]

That was a question?

Wtf

Particles?

[outer parrot]

Bro I was like what the hell maybe I make an a star come back after all

[silver star]

Oh wait

[outer parrot]

Then it went down hill

Did you prove that the vector was parallel

[indigo quarry]

Yeh

Was liek u had to do speed vector?

[outer parrot]

They both equaled 9 12 right

[indigo quarry]

Yeh

[outer parrot]

alright calm

[indigo quarry]

What u got integers ?

[kindred grove]

Yes

[indigo quarry]

How?

[kindred grove]

Are you sure you multiplied by the mass

[indigo quarry]

Did u add the forces?

[kindred grove]

Yes

[indigo quarry]

Oh 😭

Idk ur making me second guess I think I multiplied mass

[indigo quarry]

What did u put for the one marker about contradiction

[kindred grove]

Which one

[indigo quarry]

The one why it’s contradiction

[kindred grove]

Don't remember

[indigo quarry]

I said cause it suggest there is a value y less than x

[winter hare]

Easy 98%

[indigo quarry]

Bruh

What was the answer for the inequality set notation mcq

Was it 1 or 2?

[winter hare]

Yeah

[outer parrot]

I got 1

Or 2

[indigo quarry]

Yeh

[winter hare]

Yeah

[indigo quarry]

I got 1

1 as in first option

[winter hare]

Oh

I don't remember

But

I don't think it was

[indigo quarry]

Also it was a point of inflection right?

[winter hare]

It was, yes

[indigo quarry]

Was it U or N

[winter hare]

U

[indigo quarry]

Ok cool

[outer parrot]

No

[indigo quarry]

Yeh so it was option 1

[winter hare]

Yes it was

[outer parrot]

Ir want a point of inflection

[winter hare]

I drew it bro

[outer parrot]

It wasn’t

[winter hare]

It is a point of inflection

[indigo quarry]

I saw on graphing calculator it was

[winter hare]

Yh me too

[indigo quarry]

It looks like a turning point but it isn’t

[outer parrot]

What the hell I did plus minus I got a positive number

For both

[winter hare]

You get x=0

[indigo quarry]

Yeh

[winter hare]

Idk what you mean

[outer parrot]

Ye x equals 0

[indigo quarry]

For dy/dx?

[outer parrot]

But to show it was a point of inflection I did plus minus 1 of 0

[indigo quarry]

Yeh

I got a negative and positive gradient then

[outer parrot]

And it didn’t change

[indigo quarry]

It does

U went to far off I think

[outer parrot]

I must’ve differentiated wrong

[indigo quarry]

I went for +_0.5

I may have not fucked it that bad 😮‍💨

[winter hare]

Possibly yeah

[outer parrot]

That geometric sequence question was beautiful

[winter hare]

Which

[indigo quarry]

What did u get for money after 10 years?

[outer parrot]

I didn’t do the 12x part

[winter hare]

The interest ?

[indigo quarry]

Which one?

[indigo quarry]

Yeh

[outer parrot]

Binomial

[indigo quarry]

What?

[winter hare]

I forgot but it's a summation

50 times

[indigo quarry]

Oh that

[outer parrot]

I skipped the interest part

[indigo quarry]

Yeh

[winter hare]

Yh

So u should've got it fine

[indigo quarry]

I got like 6000 near that

[winter hare]

I forgot my ans tho

[outer parrot]

My friend said it was the easiest

[winter hare]

Lemme see

[indigo quarry]

No lol took me so long to figure out

What did u get for the binomial geometric sequence one?

[outer parrot]

And what was you guy reason for her money not being constant

[indigo quarry]

The r value

[winter hare]

Yes that's correct

[outer parrot]

3/2

[indigo quarry]

Yay

[winter hare]

I forgot what was my 300k

[outer parrot]

Or something like that

[winter hare]

But it was close to 300k

[indigo quarry]

3/2x

[winter hare]

Jdk if it was 325k

[outer parrot]

x???

[winter hare]

But yeah smth around 6k

[indigo quarry]

Yeh there was an x

[outer parrot]

OMG IT WAS x

[indigo quarry]

Yeh

[outer parrot]

I lost a mark

[winter hare]

Did you get the k = 2 4

2.4

Projectiles

[indigo quarry]

Yeh I think

[winter hare]

0.2 for moments

[indigo quarry]

Yeh

[winter hare]

Perpendicular one ?

[indigo quarry]

I found the distance traveled

[winter hare]

Yh

[indigo quarry]

Then did pythag

[outer parrot]

Bruh I had no idea what to do for the last one

[winter hare]

Ye

It's a

12 5 13 triangle

[indigo quarry]

Yeh

[outer parrot]

I wrote that the rope was light for the assumption

[winter hare]

Cool

[indigo quarry]

I hope my working spit make sense lol

[winter hare]

It should haha

[indigo quarry]

Yeh I wrote 3

[outer parrot]

What’s your next exam

I’m 100% capped at a B

I’ve said goodbye to kings

[winter hare]

How was your paper 1 ?

Chew

[outer parrot]

Mid

[indigo quarry]

Easy af

[winter hare]

Ah

[indigo quarry]

I did mechanics first lol

[winter hare]

I do Maths in order

[indigo quarry]

For the last question how did u like write the inequality

[winter hare]

Because they give mu

And

[indigo quarry]

What’s my?

[winter hare]

Between 0 and 1

[indigo quarry]

Yeh

But why do we discard the greater than equal 0?

[winter hare]

Because that's the lower value

You want to take the upmost value

[indigo quarry]

Oh ok cool

Oh yeh

I said cause mu cannot be zero

[winter hare]

Because if you took o

As long as you reasoned it it should be fine

[indigo quarry]

Yeh

Cool

[winter hare]

Did you get a

[indigo quarry]

I said my cannot be zero cause it was moving I think

[outer parrot]

[indigo quarry]

What’s a?

[winter hare]

15 - 11mu - smth

At the top

[indigo quarry]

Wait what

[winter hare]

When you re arrange

For a

[indigo quarry]

Did I miss a question 😭

[winter hare]

No the same q

[indigo quarry]

What

[winter hare]

The mu question

a >=

[indigo quarry]

Oh I mean I got what the question was asking

It was show that right

[outer parrot]

Did you skip any questions

[winter hare]

Ye

[indigo quarry]

No

[winter hare]

I showed it

[indigo quarry]

Can u keep on telling me questions

I forget all lol

Wanna remember what I did

Oh shit optimisation gonna come up paper 3 now 😭

[indigo quarry]

For the parallel path thing how do u do it?

[winter hare]

it's constant accelation so

s = d/t
s = (9i + 12j) / 3 = (3i + 4j) = P's velocity

To get the 9i + 12j, you do change y and change in x of the coordinates they gave

[indigo quarry]

Yeh

I did that

[winter hare]

Nice

[indigo quarry]

What did u put for the one marker then?

Why Q velocity isn’t constant?

[winter hare]

Which

Which box did you do?

[indigo quarry]

What box u mean?

[winter hare]

Idk the q

The ine with the graph?

One*

[indigo quarry]

The one marker after the parallel line thing

It was like why the velocity of Q isn’t constant like why the guy is wrong

[winter hare]

Hmm

I don't remember ibr

[indigo quarry]

Oh ok

[winter hare]

I know whag you're on abt tho

[indigo quarry]

I said cause it may be accelerating like u only know the time for a given distance

So the velocity for a given distance

So velocity might not be constant for distances after thst

Is that right?

[winter hare]

Was it

Why velocity isn't constant?

[indigo quarry]

Yeh

[winter hare]

I've got 0 clue

Idk what I pulled out in the exam

Must've waffled hard

[indigo quarry]

Oh ok nvm then

[winter hare]

That sounds pretty good to me

[indigo quarry]

Ok cool

I might have some better here than paper 1 lol

[indigo quarry]

Idk if I asked u but what did u out for why the step 3<x<y shows contradiction?

[outer parrot]

I said they could be facing nortj easy south or west

[indigo quarry]

But they are parallel

[winter hare]

If you do the maths the values don't end up matching up

[indigo quarry]

Wdym?

[winter hare]

Multiply out the inequality

[indigo quarry]

How?

[winter hare]

Times by the denominator

And minus whatever was there

On bith sides

[indigo quarry]

Oh I see

[outer parrot]

I’m talking about q

[indigo quarry]

I said like the value of y suggests that there is a number smaller than x since y<x

So the statement wasn’t valid

[winter hare]

Maybe

These stupid 1 markers

[indigo quarry]

What I don’t get was like was k meant to be an integer?

Or any value

[winter hare]

Any

[indigo quarry]

Oh ok

[winter hare]

Because it will get infinitely small

[indigo quarry]

Yeh

[winter hare]

So there's no smallsst

[indigo quarry]

Oh I see

[winter hare]

A bit of a stupid one tho icl

[indigo quarry]

Yeh

[winter hare]

I used her trash reasoning for part b

[indigo quarry]

The point of inflection one did u have to also say it was stationary

[winter hare]

Idek what she was on abt

[indigo quarry]

Yeh

[winter hare]

No

[indigo quarry]

It was I think though

[winter hare]

Did you do d2y/dx2 =0?

[indigo quarry]

I just put it down in case

[winter hare]

Or dy

[indigo quarry]

Yeh I did that too

[winter hare]

Then it's fine yeah

[indigo quarry]

Yeh cool

So for the parallel one thing u had to compare velocities right

[winter hare]

Yeah

Wait

Yeah

I'm surprised no circles have come yet

[indigo quarry]

Paper 3 sure

Not much trig too

[winter hare]

I think they left all the hard topics for paper 3

[indigo quarry]

Innit

[winter hare]

Optimisation, modelling with trig

And whatever else

[indigo quarry]

Optimisation connected rates of change

Parametric 😭

[winter hare]

Yh fr

It's either gonna be easy

Or super hard

[indigo quarry]

Half of integration lol

[winter hare]

Fr bro

😭😭

[indigo quarry]

The partial fraction was nice

[winter hare]

Hopefully it's the hardest paper ever

[indigo quarry]

For the range what did he get?

[winter hare]

What's the range

Which w

Q

[indigo quarry]

Less than 1/3

[winter hare]

Yeah and more than

[indigo quarry]

The one about binomial expansion

[winter hare]

-1/3

Ye

[indigo quarry]

Yeh I said mod

X

[winter hare]

Or mod x < 1/3

[indigo quarry]

So yeh

Yeh

[winter hare]

Cool

[indigo quarry]

Ok cool

[winter hare]

Sounds like you did good then

[indigo quarry]

I actually did pretty okay then

[winter hare]

So we're good

[indigo quarry]

Yeh

I was worrying too much 😭

[winter hare]

I was expecting some nasty stuff

[indigo quarry]

Yeh

I was panicking

[winter hare]

Now stats I ain't done in months

😂😂

[indigo quarry]

This guy behind me idk if he finished early but sat there for 1 hour doing nothing

[indigo quarry]

Same bro

[winter hare]

Probably gave up

[indigo quarry]

Literally

[winter hare]

I finished an hr early tho tbf

[indigo quarry]

I felt like I had less time for this one

[winter hare]

Hbu

[indigo quarry]

Oh lol

I finished like 10 minutes left

[winter hare]

Oh for the first paper I sat it twice

Aswell

[indigo quarry]

Why?

[winter hare]

To check my answers

🤣🤣🤣

[indigo quarry]

Oh ok

[winter hare]

I had like an hour spare

[indigo quarry]

😂

[winter hare]

So I did the test again on spare paper

[indigo quarry]

Nice

My brain wasn’t functioning at first so I had to do the mechanics stuff

[winter hare]

Are you better at mech?

[indigo quarry]

For the forces one do u remeber what u for for a and b the one about forces and acceleration

[indigo quarry]

Yeh I suppose maths mech is pretty decent and straight forward

[winter hare]

I think 12 was in there

Or an 8

Might be in my calc

Lemme check

[indigo quarry]

For a and b?

[outer parrot]

Optimisation on paper 3

[winter hare]

I think so

[indigo quarry]

Defo

[outer parrot]

It was 11.5

[indigo quarry]

Oh I fucked that 😭

[winter hare]

Lemme see

You might be right

[indigo quarry]

Yeh I got decimals too

[outer parrot]

And 8

[winter hare]

I remember an 8 yeah

[indigo quarry]

Wait did u do simultaneous equations?

[winter hare]

Idk what this is

[winter hare]

Yeah w the top and bottom

[indigo quarry]

Ok yeh I did that

[winter hare]

Also for partial fractions p and q

[outer parrot]

It was 11.5

[indigo quarry]

Idk my answers were so off

[winter hare]

Whatdid you get

[indigo quarry]

I got like fractions lll

[winter hare]

I don't think I got thag

[outer parrot]

P and q were like 8 or something

[indigo quarry]

Yeh 84 I think

[hollow talon]

Guys

[outer parrot]

• something

[hollow talon]

How was it

[winter hare]

Was there a way to check your answer ?

[indigo quarry]

Not really no

[winter hare]

Solid

[indigo quarry]

Okay

[hollow talon]

That’s good

[winter hare]

As in for the next parts ?

[outer parrot]

There’s going to be integration by parts

[winter hare]

You had to use it didn't you

The 36x / smth

[hollow talon]

What were the long answer questions like

[winter hare]

So u divide by 3

Ur partial fractions

Remember

[indigo quarry]

Divide by 3?

[winter hare]

Weren't any tbf

I think max was like a 5 matker

[indigo quarry]

Fuck I divided by 2 😭

[hollow talon]

Oh that’s cool

[winter hare]

Yeah

It gave

[indigo quarry]

Fuck me

Fuck me 😭

I fucked up shit

Was it 3 marks?

[winter hare]

Was it a show that?

I don't remember the q

[outer parrot]

It was 2 marks

[indigo quarry]

Yeh

[winter hare]

Whag was the q

[outer parrot]

Q was like -4

The partial fraction

[hollow talon]

This is aqa right

[indigo quarry]

Yeh

[outer parrot]

P was 8

[winter hare]

Do you remember the fraction?

[outer parrot]

Nah

M

[winter hare]

I don't think I got -4 tbf

Yeah you're right tho

What do you think A* will be

Like 250 / 300 or smth

[indigo quarry]

I think slightly higher but around there yeh

85% so far but hope paper 3 is easy it’s usually the easier one but all easy topics came up now so might be the hardest paper

[indigo quarry]

Whhat question is this?

If anyone finds the paper online on TikTok or something with the answer and shit pls post it on here and tag me 🙏

[outer parrot]

The partial fraction

[indigo quarry]

Oh ok

[indigo quarry]

I got what u got but I don’t remember which one was which

And I put it in my calc and it worked so I’m pretty sure it’s em right

[hollow talon]

Did anyone get the question on proof the 4 marker

I had to skip ran out of time ☹️

[indigo quarry]

Contradiction one?

you basically rewrite everything that was given in the previous part but just change some numbers

It wasn’t that bad

[winter hare]

It wasn't a point of inflection btw

[indigo quarry]

Oh my god 😭

Why?

[indigo quarry]

Why ?

Bruh I’m cooked 😭

[topaz shell]

U gotta check obviously

[indigo quarry]

I did

But I was unsure

[topaz shell]

If there a sign change

Then there is one

[indigo quarry]

For second derivative?

Or change of sign for first derivative?

[hollow talon]

What I thought if there's isn't sign change there is one

[indigo quarry]

I mean I showed the working just messed up final statement oh well

[hollow talon]

Cos it carries up the same way it started from?

[hollow talon]

Aaaaa 😭 I wish I'd had the time to go back to it idk why my time management was so shit in that

[indigo quarry]

Literally same

I mean I never struggled with time in maths if I had time I would have saved so much more marks 😭

Now I actually got to try hard for stats if I wanna secure the A* 🙂🙃

[hollow talon]

Ong in the past papers I was doing I always finished like 10m early

Too much adrenaline fucks me so bad

[indigo quarry]

I finish like half an hour early

[hollow talon]

Praying for u 🙏

[indigo quarry]

Literally facts

[indigo quarry]

Thanks

[indigo quarry]

What marks do u think u got?

[hollow talon]

Honestly not a clue I have no sense of how well I do after exams but it felt like a B or an A

[indigo quarry]

Oh ok

[hollow talon]

Wtaf

[indigo quarry]

Happens to me to lol

When connection is bad

[hollow talon]

;_;

Tf it keeps keeping my messages

[indigo quarry]

Yeh

[hollow talon]

Wbu?

[indigo quarry]

I think around 88

[hollow talon]

:o

[indigo quarry]

So maybe worst case scenario borderline A*

Many people said it was easy so 🤷🏽

[hollow talon]

It was nice but easy idk abt thar

[indigo quarry]

I personally found it okay

[indigo quarry]

Yeh I agree

[hollow talon]

The second vectors question wasn't great

With the timings and perpendicular thing

[indigo quarry]

Took me a while I was ready to give up but I had like 5 minutes left so I gave it a go and it worked out luckily I got it

[hollow talon]

Luckyhhh

[indigo quarry]

Yeh

I fucked yo the partial fraction expansion one

I thought 36/12 was 2 💀

[hollow talon]

Oh no 😭😭

Small mistake atleast

[indigo quarry]

Yeh it wasn’t worth much

Only thing I’m worried about is my statements in some questions

[hollow talon]

Ohh fr I was thinking abt that in the exam yk the part a of the 2nd vectors question qhere u have to be like therefore they're parallel or sum what did you write for that

[indigo quarry]

Idk if I did it right

How did u do it?

[hollow talon]

I think I missed the last mark isk if I concluded well enough

[indigo quarry]

Idk same maybe

[hollow talon]

Just therefore parallel ☹️

[indigo quarry]

Like I found the velocity of Q I think and I said they are same vectors so parrallel

Or like they are multiple of each other

[hollow talon]

OH

Yeah that's it

Fukk

[indigo quarry]

Yeh

But I got the same vector so

Idk if I did right

[hollow talon]

Wdym

[indigo quarry]

Did u find the speed of Q?

Like u found the position vector like the distance

[hollow talon]

I compared like overall position vector of one to the velocity vector or something of another

I did i question like that this morning

[indigo quarry]

Wdym?

[hollow talon]

I didn't understand how u could compare like direction and velocity

[indigo quarry]

U we’re given time right

So u could fund velocity

I did that

[hollow talon]

In part a?

[indigo quarry]

Yeh

[hollow talon]

That's b with the times

[indigo quarry]

No time was there in a

I’m pretty sure

Like 3 seconds

[hollow talon]

I'll take ur word for it my brains fried

[silver star]

theres a third derivative

and it = 0

[indigo quarry]

Shush

[silver star]

so therefore it isnt a point of inflection

[indigo quarry]

Yappa yappa

[indigo quarry]

I can’t believe I got cooked for that exam 😭

[silver star]

😭

[indigo quarry]

I messed up so many easy marks 😢

[outer parrot]

YESSSS

[indigo quarry]

I think ur method was still wrong

[outer parrot]

Bro my method was I found plus or minus one set my second derivative equal to 0

Got one

Went plus or minus down

No change in sign

[indigo quarry]

But sign changes

The graph kinda looked liked a quadratic and x=0 was like a ‘turning point’

[outer parrot]

It had no sign change bro

If it’s an inflection point there would

[indigo quarry]

U sure?

[outer parrot]

1000%

[indigo quarry]

I thought inflection point didn’t need to have change of sign

[outer parrot]

It has to

Where did you learn that

[indigo quarry]

Let me check

I swear they can

Isn’t like the inflection point on x cubed go from increasing gradient to decreasing

Oh wait are u talking about second derivative changing sign ?

[outer parrot]

Ye

[indigo quarry]

Oh ok I did it in terms of first derivative

So for me I got the gradient before that point is decreasing and the gradient after is increasing

So I guess it ain’t a point of inflection

[outer parrot]

never do that

Optimisation is coming next paper right

I didn’t see it it paper 3 2023

[indigo quarry]

Why?

[hollow talon]

Why can’t you do second derivative

[indigo quarry]

U can

But I swear u can do first too

It’s literally what defines a point of inflection

When curve goes from concave to convex or vice versa

[outer parrot]

It tells you whether it’s a decreasing or increasing function at that point

[hollow talon]

Your calculator can do that for you

If you have the cg50

[outer parrot]

Me nah had c950 me had the og calculator

[hollow talon]

Sad

[indigo quarry]

Yeh

[indigo quarry]

U had to show ur workings it was a justify question

[hollow talon]

Aw

Well at least you could check

Just do fmax/fmin

[indigo quarry]

?

[hollow talon]

On the cg50

[indigo quarry]

Oh 👍

[hollow talon]

Same

[indigo quarry]

I mean it works out cause my teachers notes I doubt are wrong

[outer parrot]

Time to revise whole of stats

I’m trying t get a 100%

On stats

Only thing we have to remember is sampling right

And lds

[winter hare]

Omds LDS

[winter hare]

Fr I haven't done in months

[indigo quarry]

Same

Stats in fm is so much easier

[silver star]

It doesn't

😭

[indigo quarry]

It wasn’t inflection point btw

Idk if u put it was

[silver star]

I put it isn't

Third derivatives is =0

So for sure it isn't

It's only when first and second =0 and third ≠p

0

But point of inflection doesn't have a sign of change

If you think about x³ graph

[kindred grove]

It does

[silver star]

Gradient is positive

Then 0

[kindred grove]

For the second derivative

[silver star]

Then Positive

Oh

It isn't the correct method anyhow

You cannot use a change of sign to determine a point of inflection

I have never seen anyone doing that before, it's either differentiation or just observation from the graph

[kindred grove]

Yes you do

You check if it's zero

And then check either side to see if it's changed from concave to convex or vice versa

[silver star]

No the markscheme wouldn't allow it

I cannot see any past questions with this method before except if they had specifically mentioned show by change of sign

In this case, the question did not mention any of the "change of sign" therefore it doesn't work like that

And usually there's no alternative method for differentiation questions

[kindred grove]

What past questions are you looking at?

[silver star]

There are varieties of different past questions, which one are you referring to?

I have done all AQA past papers 🙂

[kindred grove]

The change in sign question you are referring to

Since checking the change in sign of the second derivative is a mathematically correct method

So is your method

[silver star]

The one that I'm referring to is when you are given two values and you are checking if there's a turning point between for second derivative

I believe the 2024 point of inflection question stated x=0?

[topaz shell]

this question was so beautiful

[indigo quarry]

What’s third derivative 😭

[silver star]

Omg yahh, I got confused where they got the -25g at first then realised the coefficient is 1

[indigo quarry]

I didn’t include that statement 😭

[kindred grove]

2018 paper 3

[silver star]

Because I substitute 0 into it and it just gives me 80g but it's all good now I figured it out afterwards

[topaz shell]

Yh you’ll loose a mark

5 is still okay

[indigo quarry]

Yeh

I thought ill loose 2

[indigo quarry]

I did say mu cannot be zero or something cause it’s moving idk if that counts lol

[topaz shell]

you have to see between 0 and 1

this a copy of AS Q

I still remember the q

[silver star]

Valid

[kindred grove]

Have you managed to get AQA fm mechanics/stats

[indigo quarry]

Can u send me the paper with th answers pls

[silver star]

Lovely question too

[indigo quarry]

I don’t know why it was a show that question if it wasn’t it would have thrown many people off cause units were cm

[topaz shell]

Yeah they all came today I’ll be doing them later after this paper

kinda similar to this q

[kindred grove]

You will love it

Do a speedrun

[indigo quarry]

Wait ur the guy who posted the answer on TikTok?

[topaz shell]

could do

[topaz shell]

yeah 😂

[indigo quarry]

Send it to me Riad pls send the new one

[topaz shell]

you all can check

[topaz shell]

which one

[indigo quarry]

Paper 2

[kindred grove]

Is that 7

b=7

[indigo quarry]

Bro I did this

My answers were so wrong though 😭

Idk what I did wrong

[topaz shell]

1

[topaz shell]

I’ll send in a few mins

[indigo quarry]

Ok no probs

[winter hare]

Riad

There is a question on POI

[indigo quarry]

Yeh

We don’t talk about that 💀

[winter hare]

What is this ?

I don't remember thos

[indigo quarry]

It wasn’t there

I think that’s from another paper

[indigo quarry]

U gone?

[hollow talon]

When are you gonna post them on tiktok

[topaz shell]

There’s one question I couldn’t

Do

[topaz shell]

Yh dm me I’ll send it to u

Did you do the contradiction question?

[indigo quarry]

Me?

[topaz shell]

Yh

[indigo quarry]

Yeh kinda

All I did was do the same thing as the previous question and changed a few bits though

[winter hare]

Which one ?

[indigo quarry]

Contradiction. One

[open oyster]

a.

[indigo quarry]

Not u

[open oyster]

IM FAILING PHYSICS

[indigo quarry]

Shush