2014 Mathematical Methods Exam 2 Paper + Solutions (MCQ + ER)

[Brunette15]

Does anyone have mc solutions with the actual questions written?

[GeniDoi]

Thanks! RKTR already pointed this out - it's in the OP

No worries. Thanks for writing the solutions for these exams

[NyaTaku]

Does anyone have mc solutions with the actual questions written?

Would like these too.

[outtaheresoon]

do you think it's fine if the equation of the tangent wasn't expressed in the form y=mx+c?

[chuck981996]

Chuck do you reckon you'll be able to keep being the sick kent you are and post the spec solutions tomorrow and monday? (I'm praying yes - seeing the solutions completely gets rid of that uncertainty/anxiety post exam) haha

You're fkn amazing man, you did like both exams in 20 min - glad i'm not competing with you in methods this year haha (but you're in spec - so for that  )  hahaa

Nah I won't do spesh - I'll be too busy worrying about my own solutions!!

[keltingmeith]

If someone can supply me an exam, I can get solutions up for specialist. Of course, if you have gotten a copy of the exam, I'd presume you could do the solutions yourself.

[speedy]

Nah I won't do spesh - I'll be too busy worrying about my own solutions!!

Could you explain why 5b is in the negative direction? Maybe I'm going full retard here or something but I don't get it. Shouldn't it be in the positive direction?

[jumcakes]

Could you explain why 5b is in the negative direction? Maybe I'm going full retard here or something but I don't get it. Shouldn't it be in the positive direction?

Probably would be better on the main discussion board - but we want the transformation that maps f(x) to g(x) - that is the transformation that maps the quartic f(x) with intercepts at (1,0) and (3,0) to the quartic g(x) with intercepts (0,0) and (2,0) - so we move one left.

Additionally, (x-3)(x-1)(x^2+3) becomes ((x+1)-3)((x+1)-1)((x+1)^2+3) = (x-2)x((x+1)^2+3)= g(x) which is what we want!

[chuck981996]

Could you explain why 5b is in the negative direction? Maybe I'm going full retard here or something but I don't get it. Shouldn't it be in the positive direction?

Because the transformation maps x->x+1.

To see very clearly, have a look at the graphs I did on Wolfram Alpha (attached). See how, to get g(x) from f(x) we must translate it by 1 in the negative direction?

[speedy]

OMFG I was reading the question wrong the whole time :/
Thought it was g(x) to f(x) lolz, sorry guys

[S61778]

Isn't q17 on multi choice A?

[vizard12]

Hey for question 4d i calculated the z value using .15 as area which gives  z=-1.03643.
I then calculated standerd devition using squareroot(intergral from 0 to 50 of (x-25)^2 * h(x) dx).
then i solved z=(x-25)/standard deviation just caluated for x.
i got 13.7227 for x, have i completely overcomplicated this and will get 0 marks?
cheers

[swagsxcboi]

Isn't q17 on multi choice A?

nah, A, when a=3 gives you infinitely many solutions iirc

[Yuki N.]

Can someone explain why q2f is m/hr and not m/yr for units?

[althepal]

For 2f. I used 10 instead of -10 and ended up with a positive answer. How many marks will I lose for that?