VCE Methods Question Thread!

[shadows]

Help please I've done part e&f just need help with g thanks!

I just used trial and error. That's what they said in the assessors reports if I can remember correctly.

[papertowns]

I just used trial and error. That's what they said in the assessors reports if I can remember correctly.

Ohhh okay thanks

[ahat]

What do you mean? What's this for?

For a circular function, the x-axis intercepts, could we write, for example, (45^o, 0) opposed to (π/4, 0)?

[Sanguinne]

in vcaa exam 2 2012 q 4e

why is the tiime in minutes equal volume divided by the rate of 0.2 ms cubed.

[Zealous]

in vcaa exam 2 2012 q 4e

why is the tiime in minutes equal volume divided by the rate of 0.2 ms cubed.

Time:



The m^3 cancel out and you get:

Questions from 2013 Neap Exam 1

1. The mean and the standard deviation on Mrs Tuff’s last Year 12 Maths Methods test were
72 and 8 respectively. She thought these were too high. Mrs Tuff is going to transform the
scores so that the new mean is 65 with a standard deviation of 5.
If the random variable X represents the original scores and the random variable Y represents
the transformed scores, then Y = aX +b, where a and b are positive constants.
Find a and b

By any chance is a=5/8 and b=-7?

[achre]

For question 10a on VCAA 2009, is it sufficient to leave the answer as , or does the approximation aspect of the question require you to give a decimal answer?

[shadows]

For question 10a on VCAA 2009, is it sufficient to leave the answer as , or does the approximation aspect of the question require you to give a decimal answer?

should be fine

[Zealous]

1. The mean and the standard deviation on Mrs Tuff’s last Year 12 Maths Methods test were
72 and 8 respectively. She thought these were too high. Mrs Tuff is going to transform the
scores so that the new mean is 65 with a standard deviation of 5.
If the random variable X represents the original scores and the random variable Y represents
the transformed scores, then Y = aX +b, where a and b are positive constants.
Find a and b

EDIT: a= 5/8        b=20

I only know how to find a, I have no clue how to find b =0

There's some formula that goes something like this:



Old variance = 64 and new variance = 25.





That's the general idea, I vaguely remember the formula, and it worked out, but I'm not sure how to find b.
Maybe someone else is more familiar with this =p

[Damoz.G]

For question 10a on VCAA 2009, is it sufficient to leave the answer as , or does the approximation aspect of the question require you to give a decimal answer?

That should be fine. You don't want to find a decimal, just in case you incorrectly find it. Because if the decimal answer is wrong, you  would lose the mark for the final answer. =/

[Mafioso]

How do I work this out manually? I dont get how to make the numerator the derivative or whatever 

dx

Edit: typo

[achre]

You wouldn't get something like that in methods, at least not in a CAS-free environment.

[Mafioso]

You wouldn't get something like that in methods, at least not in a CAS-free environment.

Fixed up the question.

[SocialRhubarb]

How do I work this out manually? I dont get how to make the numerator the derivative or whatever 

dx

[abcdqd]

Questions from 2013 Neap Exam 1

1.

Two rules to use here: and

Spoiler

2. I tried to integrate it, but i got a neg number?

[Rectophobia]

[quote
Cosec = 1/cos
Sec = 1/sin
[/quote]

Sec and Cosec are the wrong way around. I think the double angle and compound angle formulas are useful (although I don;t know how often they pop up in methods) and possibly the altered versions of the Pythagorean identity (Although I think these are more so used in spesh)   


*Edit: I can't quote for shit