General thoughts- Extension 1 maths (1 Viewer)

[Hikari Clover]

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]

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]

how did u guys do Q5 (c) ?

 

[Legham]

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]

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]

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]

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

YES THATS WAT I GOT TOOOOOO!!! =]

 

[mikietom]

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]

omg. did not finish. not good.

who actually finished the whole thing?

 

[collide]

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

 

[MonsterCookie]

qu 3a) i was the induction

3bi) was the inverse 1 dur

No, Ouestion 4b) was the induction...:burn:

 

[desipryde]

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+

 

[gaoOO]

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]

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

 

[FromDeeEast]

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

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

seriously cant believe how badly i went

 

[woho]

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

 

[Legham]

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.

 

[gaoOO]

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]

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]

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.