General thoughts- Extension 1 maths (1 Viewer)

Hikari Clover

Member
lilfrenchi said:
did anyone do q7 (ii)? thats the only q i couldnt do lol
for part iv
tan @= m
use a small triangle to find sin@ and cos@
then find max range using y=0
so u will get it

lilfrenchi

New Member
Hikari Clover said:
so what answer did u get?
I(0-->10)50-50e^(-0.2t)
= [50t +250e^(-0.2t)]0-->10

cant find my calculator lol sorry

Hikari Clover

Member
how did u guys do Q5 (c) ?

Legham

Active Member
I think i got somewhere around 533m for 2 d (ii).. Sound about right anyone?

how did u guys do Q5 (c) ?
Yeah, those were gift marks i reckon. So easy.

lilfrenchi

New Member
Hikari Clover said:
how did u guys do Q5 (c) ?
add the 2 equations to get
arcsinx + 3arcsinx = pi/3 + 2pi/3
4arcsinx=pi
arcsinx= pi/4
x=1/sqrt2
then sub that in one of the equations to find y

Hikari Clover

Member
Legham said:
I think i got somewhere around 533m for 2 d (ii).. Sound about right anyone?

Yeah, those were gift marks i reckon. So easy.

ye, i got 5xx as well

for Q5(c) , how many solutions did u get?
i got 1 for X and Y only,shouldn't it be 2 for each?

lilfrenchi

New Member
Legham said:
I think i got somewhere around 533m for 2 d (ii).. Sound about right anyone?

YES THATS WAT I GOT TOOOOOO!!! =]

mikietom

New Member
lilfrenchi said:
did anyone do q7 (ii)? thats the only q i couldnt do lol
i thought that question was just to make up the 7 questions i didnt realise u had to answer it

live.fast

Member
omg. did not finish. not good.

who actually finished the whole thing?

collide

Member
I wish I had more time.. oh well lol. NO MORE MATHS!!

New Member
FromDeeEast said:
qu 3a) i was the induction

3bi) was the inverse 1 dur
No, Ouestion 4b) was the induction...:burn:

desipryde

New Member
well i finished 10 mins earlier and spent mins trying 2 do the last part of q7 iv) but still cudnt lol

other than that it was better than last years, go look @ the 2006 paper, ud b so happy u didnt do this exam last year lol

but ye since im not good @ Parametrics crap and Circle Geometry i made no attempt, but the rest was pretty ordinary
expecting a 60+

G

gaoOO

Guest
Hope i didn't make any stupid mistakes

i had to fudge the ln (x + root x^2+4 /2) queestion because i didn't know why it was the positive case.

i thought it was a pretty difficult extension 1 test, seemed longer than the past hsc, maybe on par with last year's paper? but i'm not sure. The extension 1 students probably have a better idea of the difficulty than the extension 2 students.

ok, maybe not on par with last year's paper going by what dispryde just said.

woho

Member
nooooo!i just realised i didnt do 6aiii and iv. How could i miss them?!

FromDeeEast

Member
wow i found the test pretty hard... harder then 4u

.... i reckon i got 50/84...

seriously cant believe how badly i went

woho

Member
I"m hoping for around 70/84. Damn, how could I miss those 2 Shms...

EDIT: harder than 4unit? What planet r u on man, 4u was gay

Last edited:

Legham

Active Member
YES THATS WAT I GOT TOOOOOO!!! =]
Oh thats reassuring then Someone was talking about limits and shit and i didnt use anything like that :/ Just subbed t = 10 into the equation for x.

i got 1 for X and Y only,shouldn't it be 2 for each?
I thought that too at first, but then i realized it meant 2 values all together. ie, 1 for x, 1 for y. I'm pretty sure thats it anyway.

G

gaoOO

Guest
woho said:
I"m hoping for around 70/84. Damn, how could I miss those 2 Shms...

EDIT: harder than 4unit? What planet r u on man, 4u was gay
i found it harder than 4 unit too- there's so much room for error in the 3 unit exam, while 4 unit, you got the proofs, you're looking at a great scaled mark.

Legham

Active Member
No, Ouestion 4b) was the induction...:burn:
Lol, those posts were made before the test.. we were being smart asses cause this thread was made at like 1am this morning..

Starcraftmazter

Member
Blah. It started of very easy, and then some harder questions poped up and screwed me over =/

I did everything except last question, and I also skipped about 3 things.

Mainly the circle geo question pissed me off like hell. I am very good at circle geo, and every past ext1 paper I've done, I got the answer in like 10 seconds, and here I was sitting for like 5-10 mins trying to figure it out and couldn't.
That's what really really pissed me off >_<

In relation to question 5c...damnit I forgot how I did it, gime a sec.