2009 Mathematics 2U HSC Worked Solutions (1 Viewer)

question 3 c?

ohhh..

FML

anom1ly

Member
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

Member
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

Actuarial Co-op 06
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 *

T.Goodhew

Actuarial Co-op 06
question 3 c?
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 *

M@ster P

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

51684

Member
isnt Q3 b ii) 2 and half not 2

lyounamu

Reborn
Top in the state for 2 unit is our school's

daniieee

Member
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

Member
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

T.Goodhew

Actuarial Co-op 06
isnt Q3 b ii) 2 and half not 2
Nope, i'm sure about that one it's definitely 2.

snakesena

New Member
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

harloman

New Member
Equation for 3. d) doesn't seem quite correct..

Runtypoo

New Member
By that guys working, i got 120/120

lyounamu

Reborn
By that guys working, i got 120/120
congrats. Now get a nice formal suit and get ready for the big day

cutemouse

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

Taylz24

New Member
By that guys working, i got 120/120
I hope you don't david
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!

Last edited:

C-BAS

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

etak1991

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