[LIVE] VCAA 2023 Specialist Maths Exam 1 Solutions

[qncubed]

I haven't touched much spesh in 2 years so I'm very rusty... here are the errors:
Q3a) Forgot to multiply by a factor of 8/3, answer is -56/27
Q6b) The standard deviation used should be 1/2, so a=-1/2 and b=1
Q10d) I should also include k=0

[darcash]

Just wanted to look at this to see what exams are like over there. I don’t get 3a, isn’t acceleration just the derivative of velocity and that’s it? Where’s does multiplying by velocity come from

[Runaasu]

so the P(k+1) is missing an x after the 2 to the power of k+1 so that it is in the same form as P(n)?

[alexglover]

For question 7, I got the same answer as you, but I doubled it because It said hollow which threw me off. (I did write but because its hollow the surface area has to be doubled, so incase they are unsure of what I was doing I explained it), I was maybe thinking that the surface area on the inside they wanted to account for?. Given that the width of it would be approaching zero. I spoke to teachers about it and they said that the wording is bad because it didn't say if it wanted the total surface area which would include the inside of it or just the surface area on the outside which is what everyone else did. Would I be marked incorrectly.

[littlefarnsy]

Is question 3 right, dont you need to substitute 2 into the (3x+2)/(2x-1) as well?