Login

Welcome, Guest. Please login or register.

October 09, 2025, 08:46:40 am

Author Topic: My Suggested Solutions to SP2008 Exam 2 [Confirmed]  (Read 33732 times)  Share 

0 Members and 1 Guest are viewing this topic.

Synesthetic

  • 2008 VN Dux
  • Victorian
  • Trendsetter
  • **
  • Posts: 177
Re: My Suggested Solutions to SP2008 Exam 2 [Near Completion]
« Reply #45 on: November 11, 2008, 07:15:36 pm »
I'm fairly sure 7 is D and 12 is A =/

Yes, you're right, I rushed those :( Changing
2007- History Revs (44)[46], Chinese SL (32)[44]
2008- English (50)[50], Literature (50)[50], Methods (49)[49.7], Specialist (44)[50.5], Chemistry (41)[45]
ENTER: 99.95

stanas

  • Victorian
  • Fresh Poster
  • *
  • Posts: 4
Re: My Suggested Solutions to SP2008 Exam 2 [Near Completion]
« Reply #46 on: November 11, 2008, 07:17:00 pm »
HOW DO YOU DO THE VERY LAST QUESTION?????????

benwonglovesdong

  • Victorian
  • Fresh Poster
  • *
  • Posts: 1
Re: My Suggested Solutions to SP2008 Exam 2 [Near Completion]
« Reply #47 on: November 11, 2008, 07:18:27 pm »
I'm fairly sure 7 is D and 12 is A =/

yeah, 12 must be A. f is the quadratic and then F is the cubic... antidif from -3 to 0 must be negative.... =A

Synesthetic

  • 2008 VN Dux
  • Victorian
  • Trendsetter
  • **
  • Posts: 177
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #48 on: November 11, 2008, 07:19:33 pm »
I'm fairly sure 7 is D and 12 is A =/

yeah, 12 must be A. f is the quadratic and then F is the cubic... antidif from -3 to 0 must be negative.... =A
;D
2007- History Revs (44)[46], Chinese SL (32)[44]
2008- English (50)[50], Literature (50)[50], Methods (49)[49.7], Specialist (44)[50.5], Chemistry (41)[45]
ENTER: 99.95

pfftlah

  • Victorian
  • Trailblazer
  • *
  • Posts: 31
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #49 on: November 11, 2008, 07:25:37 pm »
i also disagree with neobeo's solutions..i got all the same answers as you synesthetic.
did anyone finish with time to spare?!

xers

  • Victorian
  • Forum Regular
  • **
  • Posts: 94
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #50 on: November 11, 2008, 07:26:09 pm »
Yes, i got 30 seconds to spare.

eza

  • Victorian
  • Adventurer
  • *
  • Posts: 9
Re: My Suggested Solutions to SP2008 Exam 2 [Near Completion]
« Reply #51 on: November 11, 2008, 07:27:34 pm »
I agree with Synesthetic and disagree with NeoBeo:

For NeoBeo:
in aii - lost a square root
in c) it only passes origin when both sin(t/3) and sin(2t/3) are zero, so time is 6 pi
d) not zero, cos(t) = sin(t) / tan(t) is dividing by zero which is why you came up with zero. Just sub in t = 0 or t = 3pi so v = +/- 1/3i + 1/3j, |v| = sqrt(2)/3
ei) cos(2t/3) <> sin(t/3), cos(t/3) = sin(pi/2 - 2t/3), actual answer just evaluate integral from fourth step to get 6.1 metres i think

In reference to c)
3 pi is fine - it is when the train is travelling from Q4 to Q2
6 pi is when it is travelling from Q3 to Q1

for T= 3pi
x = sin (3pi / 3) = sin (pi) = 0
y = 0.5 sin (2* 3pi / 3) = 0.5 sin (2pi) = 0

You can also graph this on the calc to verify that x=0 y=0 when t=3pi
English - 42(42) | ITA - 49(49) | Furthur Maths - 49(49) | Specialist Maths 45(51) | Chemistry 43(47) |Maths Methods - 42(46) |  Enter 99.55

Synesthetic

  • 2008 VN Dux
  • Victorian
  • Trendsetter
  • **
  • Posts: 177
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #52 on: November 11, 2008, 07:30:29 pm »
I agree with Synesthetic and disagree with NeoBeo:

For NeoBeo:
in aii - lost a square root
in c) it only passes origin when both sin(t/3) and sin(2t/3) are zero, so time is 6 pi
d) not zero, cos(t) = sin(t) / tan(t) is dividing by zero which is why you came up with zero. Just sub in t = 0 or t = 3pi so v = +/- 1/3i + 1/3j, |v| = sqrt(2)/3
ei) cos(2t/3) <> sin(t/3), cos(t/3) = sin(pi/2 - 2t/3), actual answer just evaluate integral from fourth step to get 6.1 metres i think

In reference to c)
3 pi is fine - it is when the train is travelling from Q4 to Q2
6 pi is when it is travelling from Q3 to Q1

for T= 3pi
x = sin (3pi / 3) = sin (pi) = 0
y = 0.5 sin (2* 3pi / 3) = 0.5 sin (2pi) = 0

You can also graph this on the calc to verify that x=0 y=0 when t=3pi
But has the train completed one CIRCUIT of the track at t=3pi?
2007- History Revs (44)[46], Chinese SL (32)[44]
2008- English (50)[50], Literature (50)[50], Methods (49)[49.7], Specialist (44)[50.5], Chemistry (41)[45]
ENTER: 99.95

chid

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 213
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #53 on: November 11, 2008, 07:30:46 pm »
I had a few minutes to spare-it was close...

For multiple choice question 2 E? and question 4 C?

Hmmm

VCE 2008:
English 49                        Physics 45
Specialist Maths 47           Economics 44  
Maths Mathods CAS 50     (2007) Chemistry 46

Aggregate 208.8
ENTER 99.90

Tutoring Methods, Specialist and Chemistry in 2009!
PM me if interested.

eza

  • Victorian
  • Adventurer
  • *
  • Posts: 9
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #54 on: November 11, 2008, 07:32:25 pm »
Ah yeap, sorry that makes sense. Didn't read the question.
English - 42(42) | ITA - 49(49) | Furthur Maths - 49(49) | Specialist Maths 45(51) | Chemistry 43(47) |Maths Methods - 42(46) |  Enter 99.55

Synesthetic

  • 2008 VN Dux
  • Victorian
  • Trendsetter
  • **
  • Posts: 177
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #55 on: November 11, 2008, 07:34:32 pm »
I had a few minutes to spare-it was close...

For multiple choice question 2 E? and question 4 C?

Hmmm



How can 2) be E? a needs to take an integer value for the circle to be defined => C

I'm not sure about 4 though.
2007- History Revs (44)[46], Chinese SL (32)[44]
2008- English (50)[50], Literature (50)[50], Methods (49)[49.7], Specialist (44)[50.5], Chemistry (41)[45]
ENTER: 99.95

pfftlah

  • Victorian
  • Trailblazer
  • *
  • Posts: 31
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #56 on: November 11, 2008, 07:37:29 pm »
i got E for 2 as well..

eza

  • Victorian
  • Adventurer
  • *
  • Posts: 9
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #57 on: November 11, 2008, 07:38:35 pm »
I got E for mc4) - basically you need to look at the gradient in terms of the asymptote. So it's never going to be between 2 and -2.
English - 42(42) | ITA - 49(49) | Furthur Maths - 49(49) | Specialist Maths 45(51) | Chemistry 43(47) |Maths Methods - 42(46) |  Enter 99.55

Synesthetic

  • 2008 VN Dux
  • Victorian
  • Trendsetter
  • **
  • Posts: 177
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #58 on: November 11, 2008, 07:38:46 pm »
I had a few minutes to spare-it was close...

For multiple choice question 2 E? and question 4 C?

Hmmm



Re. 4, consider the curve, it's hyperbolic along the x-axis. It would make sense that the gradient can take any value outside the domain [-2,2] because they are the gradients of the respective asymptotes. The curve's gradient approaches this value but never reaches it.

At the x-intercepts, the gradient approaches infinity (I think). My point is in simply visualising the graph, the gradient ranges from (-inf,2) u (2,inf) => E is correct.
2007- History Revs (44)[46], Chinese SL (32)[44]
2008- English (50)[50], Literature (50)[50], Methods (49)[49.7], Specialist (44)[50.5], Chemistry (41)[45]
ENTER: 99.95

pfftlah

  • Victorian
  • Trailblazer
  • *
  • Posts: 31
Re: My Suggested Solutions to SP2008 Exam 2 [Complete]
« Reply #59 on: November 11, 2008, 07:39:13 pm »
and for MC, Q6, doesnt imaginary include i?