Suggested Answers and Discussion - 2016 VCE Methods Exam 1

[BNard]

Can anyone think of a vcaa exam of similar difficulty, to use a reference with grade distributions?

[HasibA]

So I cooked it and forgot to simplify it to (2/3)^24. Will I lose the mark?

wth, didnt even get that as an answer, then again, not even aiming for a 25 for methods hahaha, yollo
but u might lose 1mark if its out of 3, and 1 mark if its out of 2, they ask for the most simplified exact value ahah!

[Biology24123]

So I cooked it and forgot to simplify it to (2/3)^24. Will I lose the mark?

What question are you talking about

[halo]

So I cooked it and forgot to simplify it to (2/3)^24. Will I lose the mark?

wait woah why to the power of 24?

[HasibA]

Can anyone think of a vcaa exam of similar difficulty, to use a reference with grade distributions?

i reckon 2014 exam 1? found it similar to this, except the last question to be slightly easier ahah!
maybe 2011 exam 1 too?
i have a bad feeling exam 2 tomorrow is going to be harder than 2013 exam 2... in which case.. :/

*sorry if ive accidentally double posted, slow net ahha*

[occidit]

wait woah why to the power of 24?

Sorry thought it was obvious. The probability question with tagged/untagged sheep

[brenden]

Someone just PM'd me some of their answers.

Which ones are correct, which ones are wrong? First person to send me a PM with a correct and complete set of solutions gets SIX love heart emojis!!!!!!!!!!!!!

1)
a. dy/dx =
b. 7e^5
2)
a. -1/(1-2x)^.5
b. x=-1
gradient = -1/root3
tan(x)=-1/root3
x=150*
4)
a.
b. 4+ 3ln3
3) ln(x^2+1)
a. 16/81
b. 65/81
c. (16/81)^6
5. h(x)=ln(x^2+1)
Domain: R
Range: [0, infinity)
iv. h’(x)=0, x=0 y=0
h’(-1)=-1 h’(1)=1
point: (0,0) (minimum)
b.
k-1(x)=-root(e^x-1)
ii. domain: [0,infinity) /
range: domain of k(x): (-infinity, 0]
6)
a) f(a)+f(b)/(b-a) = -4/pi
b) ∫(2*sin(2*x)-1,x,(-π)/3,π/6) / (b-a) = (-2/π)-1
7)
a. 1/15
b. 1/3
8 )
b) 1-3/e^2
c) greater as pr(x>1/e)>0.5

[F_mac]

How'd people do Q4, I used combinations but I probably stuff it up    Overall I'd say it was quite a bit more difficult than previous years, they removed all the easy questions, and the format of 8 Qs threw me a little, So I guess I'm looking at 21-23. Anyway, how'd you all find P1?

[angrypotato1]

For the last question, part a
Were you required to write the whole thing out as an integral? I only did the differentiation but I realised it could be interpreted that you needed a final statement

Bump

[jazzaa36]

Bump

A

It was only worth two marks so I'm guessing it shouldn't really matter as it was implied by the question   

[Biology24123]

You dont use derivative for average rate of change

[natdogg]

yeah think i got like 4root(3)/pi  for that avg rate of change q

[NerdyPi]

yeah think i got like 4root(3)/pi  for that avg rate of change q

Same!!! Finally some relief

[asapwhat]

its f(b)-f(a)/(b-a)
sorry lads im dumb

[halo]

Same!!! Finally some relief

me toooo yayay