VCE Methods Question Thread!

[clıppy]

So det(A) is acceptable notation in a tech-free exam for the determinant of a matrix?

[achre]

So det(A) is acceptable notation in a tech-free exam for the determinant of a matrix?

Yep.
7 o'clock, no more methods until reading time starts tomorrow, gl everyone

[Henreezy]

Yep.
7 o'clock, no more methods until reading time starts tomorrow, gl everyone

Same here.
If you (people reading this) do choose to study on, please do passive work, not active work (it will give you unnecessary adrenaline if you keep stressing yourself).
Just read over your bound reference and past papers kk.

[ahat]

Do we have to know how to graph power function to the power of 1/3, 1/5 etc.? It was on an exam and I was a bit lost on how to graph (x-2)^1/3 and (x-2)^1/5.
EDIT: Inverse of x³ etc. Got it.
Also, when graphing circular functions, can we write x-intercept co-ordinates as (45^o, 0) opposed to (π/4, 0) for example?

Thanks.

[Daenerys Targaryen]

http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2011mmcas1-w.pdf

In Qu 10. (c)

Why doesn't it work if you had made the substitution from (b) instead of differentiating first then substituting?

[lolipopper]

what would a 30/40 for exam 1 2009 be?

[ahat]

what would a 30/40 for exam 1 2009 be?

B+
http://www.vcaa.vic.edu.au/Documents/statistics/section2/vce_math_methods_cas_ga09.pdf

[Damoz.G]

what would a 30/40 for exam 1 2009 be?

B+ when doubled.

[Alwin]

Do we have to know how to graph power function to the power of 1/3, 1/5 etc.? It was on an exam and I was a bit lost on how to graph (x-2)^1/3 and (x-2)^1/5.
EDIT: Inverse of x³ etc. Got it.
Also, when graphing circular functions, can we write x-intercept co-ordinates as (45^o, 0) opposed to (π/4, 0) for example?

Thanks.

Im kinda lazy, so here's a screenshot rather than me type it all up again:


You just then apply transformations. Hope it helps


And for coordinates, I would stick to radians if I had theta as my independent variable. But, if you labelled your horizontal axis as theta^o indicating it's in degrees, I see no problem. It's just if you have only theta then it's assumed the units on this axis is in radians

[Green]

how do you get the first strand from the tree diagram e.g. 2006 question 10
i keep on trying to figure it out, but i am still stuck

i drew out the transition, which gave the 2 other strands. But i dont know value for first strand, which are 0.7 and 0.3?

[~T]

Question 7b) from Exam 1 2011. I wrote the "p does not equal zero because the "biased coin" implies that both heads and tails are possible, though with altered probabilities". The VCAA solutions say that "the cancelling out of p was rarely supported". Do you think my justification was enough?

*never applying logic to methods again*

[Lejn]

Does it necessarily mean that both are possible?

[BubbleWrapMan]

Question 7b) from Exam 1 2011. I wrote the "p does not equal zero because the "biased coin" implies that both heads and tails are possible, though with altered probabilities". The VCAA solutions say that "the cancelling out of p was rarely supported". Do you think my justification was enough?

*never applying logic to methods again*

I got full marks for just giving the one answer without an explanation. Shrug. Examiners can be somewhat inconsistent.

[~T]

Does it necessarily mean that both are possible?

Probably not. I'm just questioning it because I didn't simply neglect that solution... I'm wondering if the examiner's report is suggesting that the fact that I acknowledged that it *could* have been a solution, before then discarding it, means full marks or not.

I got full marks for just giving the one answer without an explanation. Shrug. Examiners can be somewhat inconsistent.

Ergh, indeed.

[ahat]

Can someone please run me through how to find the domain for this function:

f: R\{0} over R where f(x) = ln(|x|)
g: (-inf, -2.5) over R where g(x) = 2x + 5
Find the domain of f(g(x)).

I always seem to get these wrong, so help is appreciated. Thanks.