Maths Extension 2 Predictions/Thoughts (5 Viewers)

[SB257426]

Question

Is there a correlation between 2u/4u/3u difficult of papers? As in 2022 hard for all, 2020 easy for all etc.

i dont think so.... last years adv was super easy while we all know about last years ex2

 

[SadCeliac]

guys just checking because i had a mindblank looking at this solution...
line two should have e^ipi + 2kpi - yes??

 

[SadCeliac]

View attachment 40590
guys just checking because i had a mindblank looking at this solution...
line two should have e^ipi + 2kpi - yes??

and follow up - that's always the case for finding complex roots?

 

[bananapoggers]

dependant on what the root is of! but yeah that same notion

 

[SadCeliac]

dependant on what the root is of! but yeah that same notion

wdym dependant on z^n???

are you saying I do a different + kpi for (e.g.) z^6 = 1

 

[Sam14113]

Question

Is there a correlation between 2u/4u/3u difficult of papers? As in 2022 hard for all, 2020 easy for all etc.

Look I'm not entirely sure but pretty confident that 4U and 3U papers are written by the same people, and all of the 2U papers are written by the same people, but those two groups are distinct. i.e today's 4U may hint at the level of 3U, but 2U probably won't tell us anything.

Not that it matters

 

[bananapoggers]

wdym dependant on z^n???

are you saying I do a different + kpi for (e.g.) z^6 = 1

oh no sorry; had meant moreso if it were z^5-1 in the original eq'n – but you would've known that haha

 

[SB257426]

View attachment 40590
guys just checking because i had a mindblank looking at this solution...
line two should have e^ipi + 2kpi - yes??

yes

 

[SB257426]

and follow up - that's always the case for finding complex roots?

most of the time they are gonna tell u to solve z^n = 1 or -1 so that would be the case yes but ofcourse if they ask u to solve z^n=4+4i or something then you would have to find principle arugment and add 2kpi

 

[synthesisFR]

hey guys im just a bit confused for this one question
the question is resistance to square of velocity but i dont understand how they break it down??
And when they break it down the question basically becomes a resistance proportional to velocity question? like i dont understand why and how they get rid of the square in the question then turn it into just resistance proportional to velocity.

 

[scaryshark09]

View attachment 40591
hey guys im just a bit confused for this one question
the question is resistance to square of velocity but i dont understand how they break it down??
And when they break it down the question basically becomes a resistance proportional to velocity question? like i dont understand why and how they get rid of the square in the question then turn it into just resistance proportional to velocity.

bruh, not me picking A

 

[Hudz777]

View attachment 40591
hey guys im just a bit confused for this one question
the question is resistance to square of velocity but i dont understand how they break it down??
And when they break it down the question basically becomes a resistance proportional to velocity question? like i dont understand why and how they get rid of the square in the question then turn it into just resistance proportional to velocity.

because the vector for velocity is next to it, so it makes it kv^2

 

[SB257426]

View attachment 40591
hey guys im just a bit confused for this one question
the question is resistance to square of velocity but i dont understand how they break it down??
And when they break it down the question basically becomes a resistance proportional to velocity question? like i dont understand why and how they get rid of the square in the question then turn it into just resistance proportional to velocity.

you really need to look at the magnitude of the resistance vector in option D, and when u find its magnitude u get resistance = kv^3, and so u can immediately rule that out.Obviously not A and D as we are adding the resistive force which makes no sense at all.

I thought the question was asking resistance is proportional to v so I did B only to realise when I was marking that it said v^2 so spent an hour trying to understand why the hell it isnt D lol

 

[Sam14113]

Bam

 

[Hudz777]

Bam

wham bam here comes pam omd

 

[Hudz777]

wham bam here comes pam omd

ahhh should’ve said sam, missed opportunity

 

[carrotsss]

guys I had a dream where the exam was really easy maybe this is a sign

 

[scaryshark09]

idk if that would be good or bad

 

[shywa]

Any thoughts on which topic they'll give the brutal questions on?
Vector and complex proofs have been pretty popular among the trial papers.

 

[SadCeliac]

guys I had a dream where the exam was really easy maybe this is a sign

i had that for english so it's a good omen surely