General Thoughts: Mathematics Extension 2 (3 Viewers)

[dan964]

substituting x=e^u made it a bit easier

 

[darkness70]

And btw whats the theorem called when a value for eg:
0^- < x < 0^+

and then you assume at lim n-> infinity x->0

It's the pinching theorem

 

[mreditor16]

i think the start was harder but end was easier. i feel like the e4 might be a little lower, but the top end will be "sandwiched" together because last q was fairly simple

hmm agreed.

I felt like I had a dodgy start, didn't get a rhythm I usually get at the beginning of exams, but as I got to Q13, 14 and 15, it felt much much smoother and it felt like I was more in the zone.

 

[aDimitri]

"without using calculus, sketch the graph y = x^2 - 1/x^2"

*uses calculus in pencil to check intercepts, asymptotes and trends*

what a waste of time

 

[mreditor16]

what a waste of time

+1

especially since question was 2 marks.

1 mark probs for x - intercepts and even function

1 mark for asymptote and shape.

 

[EpaX]

one for getting the height and other dimensions
one for getting correct area/volume expression
one for getting the correct integral with correct limits
one for evaluating the integral correctly i.e. correct answer

Do you reckon you can get the mark for the height if you just simply subbed in h = sqrt(y^2 - (y^2)/4) without drawing a diagram or labeling how you deduced the value of h?

 

[dan964]

Generally the test was a lot easier than past papers. Q16 was easier than previous years. Q15 looked challenging but when looking back it is alright.
Q11 was harder than most years.

Most years the paper got progressively harder. This year, it was almost consistent in difficulty, except obviously the end was still a bit harder than the beginning.

 

[aDimitri]

found another silly in q11 NOOOOOOOO down to 97

 

[glittergal96]

what a waste of time

How did you do aDimitri?


And does anyone have a copy of the paper to make it easier to discuss?

 

[QZP]

How did you do aDimitri?


And does anyone have a copy of the paper to make it easier to discuss?

http://community.boredofstudies.org...ts-mathematics-extension-2-a-post6773375.html

 

[aDimitri]

just realised i also found theta for when fi was a minimum rather than maximum, gg lost 2 marks that puts me on 95 tears are flowing

 

[aDimitri]

How did you do aDimitri?


And does anyone have a copy of the paper to make it easier to discuss?

well i WAS happy but i just found another 3 marks lost from silly errors. i'm sitting on i think about 95 now. lost 2 in MC, accidentally found the minimum value of fi instead of maximum, and made 1 silly mistake in q11 integral (somehow got - the answer)

 

[GOsie]

well i WAS happy but i just found another 3 marks lost from silly errors. i'm sitting on i think about 95 now. lost 2 in MC, accidentally found the minimum value of fi instead of maximum, and made 1 silly mistake in q11 integral (somehow got - the answer)

OMG same! did you also put theta = 0 or 180?

 

[QZP]

Dw... not as bad as not seeing 5 fucking marks worth of questions (in Q12 + 13). I don't understand myself anymore T_T I would be sitting comfortably in my HSC mark aim but not anymore lol

 

[aDimitri]

OMG same! did you also put theta = 0 or 180?

i wrote 0, pi, 2pi, etc.

 

[IR]

most of us are just waiting for Carret's solutions.

maybe, want to cross-check with me?

Same.

 

[IR]

i wrote 0, pi, 2pi, etc.

pi/4 was theta, I think

 

[tomnomnom696]

last question came out too easy for a last q tbh. had to do it twice to make sure i wasnt dreaming

 

[aDimitri]

pi/4 was theta, I think

quite obviously yes
i read "minimum" instead of "maximum"

 

[egress]

last question came out too easy for a last q tbh. had to do it twice to make sure i wasnt dreaming

It wasn't as easy as the last question in our Baulko trial this year though.