2009 Mathematics 2U HSC Worked Solutions (1 Viewer)

anom1ly

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ohhh..

FML :(
i have similar thoughts at the moment.

found 13 silly mistakes.

i forgot the put (+c) for the integration questions on question 2.. TWICE!

i also ruined a proof on q10 because i simplified (1+x)/(1+x) to 0 for some reason.
 

AnandDNA

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Lol i feel happier looking at the solutions, lost around 6-7 marks and all of them silly mistakes except for that triangle one :(
 

T.Goodhew

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hey, im only lookin at gettin about 90ish but in Q7,a,ii:
(u+1)(4u-1) would make 4u^2+3u-1, wouldnt it? you're meant to get 4u^2+3u+1.
i tried to do it in the test but i couldnt get past that :(
In the solutions, the equation is -4e^(-2t) -3e^(-t) +1 =0
On re-arrangement this should have been 4e^(-2t) + 3e^(-t) -1 =0
Or 4u^2 +3u -1 =0
Therefore (u + 1)(4u -1) = 0
u = -1 or u= 1/4

The solution is correct but there was a typo upon re-arrangement of the initial equation where +1 should have been -1.

* Solutions Updated *
 

M@ster P

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lmao im not reading it, i rather get the results then read it
 

daniieee

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LOL I really shouldn't write solutions at midnight, I can't believe i skipped that question. This is included in v1.2

* Solutions Updated *
#!%^&#!$%^$!@#! I can't believe I left out Q2c completely. Can't believe I didn't see it! Two easy marks out the window. I need to get my eyes checked.
 

51684

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i have similar thoughts at the moment.

found 13 silly mistakes.

i forgot the put (+c) for the integration questions on question 2.. TWICE!

i also ruined a proof on q10 because i simplified (1+x)/(1+x) to 0 for some reason.
i write a massive c on the top of my calculator so I would remember

thats not cheating is it? well if it is, no one would interpret the shape of the C as cheating
 

snakesena

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nooooooo.....I got mixed up in question 7b and wrote 5-6am, 10am-5pm! ahh i was forgetting to be safe it had to be above 1.35!!! devo...now i will get 119
 

cutemouse

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lol, I might do proper solutions after my exams are over. Depends how I feel lol.
 

Taylz24

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By that guys working, i got 120/120
I hope you don't david :p
haha

But by that working I'm looking at 115-117, looking very good so far :)

edit: Just realised I DID write the same thing as him, 117-120 now, woo!
 
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C-BAS

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I refuse to read it, on the grounds that it may lead to self harm. =(
 

etak1991

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anyone know what the allocation of marks for each question was?
 

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