2009 Mathematics 2U HSC Worked Solutions (3 Viewers)

[anom1ly]

question 3 c?

 

[meilz92]

ohhh..

FML

 

[anom1ly]

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]

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]

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]

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]

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

 

[51684]

isnt Q3 b ii) 2 and half not 2

 

[lyounamu]

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

 

[daniieee]

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]

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]

isnt Q3 b ii) 2 and half not 2

Nope, i'm sure about that one it's definitely 2.

 

[snakesena]

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]

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

 

[Runtypoo]

By that guys working, i got 120/120

 

[lyounamu]

By that guys working, i got 120/120

congrats. Now get a nice formal suit and get ready for the big day

 

[cutemouse]

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

 

[Taylz24]

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!

 

[C-BAS]

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

 

[etak1991]

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