Methods 2009 Exam 1 Suggested Solutions

[hard]

I AGREE WITH TRUE TEARS YOU NEED THE DOMAIN. I PUT IT IN LAST MINUTE WOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

For 5(c):

Isn't Pr(2nd ball = 1  |_| Sum = 5 ) = 1/4, NOT 1/12

samee

[Yoshi]

Hey for question 2b I messed up my integral, divided x by 1/2 rather than 3/2. Have I lost all three marks for that stupid error?

[simplicity123]

hm just wondering for the integral question with limits 1 to 4, i put 23/3 unit sq, would they penalise me for that?

[TrueTears]

hm just wondering for the integral question with limits 1 to 4, i put 23/3 unit sq, would they penalise me for that?

lol nah doesn't really matter, won't lose anything there

[It actually is an area anyway haha]

[simplicity123]

haha cool hope so. thanks alot for the solutions too, great work!

[googoo]

itute solutions http://www.itute.com/download-free-vce-maths-resources/free-maths-exams/

[NE2000]

I'm pretty sure that you need to give the domain lol. There's something I read on a previous assessment report. Not sure which one but I'm quite sure I read something where it asked for the inverse function and you need to give the domain.

Yeah it was pretty easy. TT for the last question I said the gradient function was a decreasing one as x gets larger so the real rate of change is < the approximated rate of change and hence the real value is less than the approximate value. That's cool yeah? I think the graph you did was a good way to show it, but I think stating it was an overestimate without the graph may not be sufficient.

[10weid]

for the last q. , if i wrote that the approx change is greater than the exact change, hence larger value...dyu rekn ill scrape the mark?? shitt....there goes my 40/40....dmannn

[TrueTears]

I'm pretty sure that you need to give the domain lol. There's something I read on a previous assessment report. Not sure which one but I'm quite sure I read something where it asked for the inverse function and you need to give the domain.

Yeah it was pretty easy. TT for the last question I said the gradient function was a decreasing one as x gets larger so the real rate of change is < the approximated rate of change and hence the real value is less than the approximate value. That's cool yeah? I think the graph you did was a good way to show it, but I think stating it was an overestimate without the graph may not be sufficient.

Yeah in the exam I wrote way more than I did in the solutions haha. I actually said that since the for the tangent is larger than the for the function f(x), thus the approximate value is greater.

And yeah your way is fine. I like the wording xD

[NE2000]

Also did anyone else find the solving for x tan question a bit weird in that it was worth 3 marks?

[10weid]

that is a bitch.
39 is def a+ right?

[moekamo]

If the implied domain of y = 3/(x+4) is R\{-4}
Why shud we state it?
Its already implied, thus I conclude there is no need for it.

LOL !!

Yea, I only wrote the domain because I had over 25 mins of "Review" time. Otherwise I wouldn't have aswell.
[BUT, its really DODGY]

I wrote the domain, its just that if its implied as the book always says then wtf shud we write it even if they ask?
Its like 1x = x, its implied 1 is coefficient. So if they then asked what is coefficient of x id say gtfo

Yea, I reckon they'll be a bit lenient

Nah a mark will  be taken off for sure if you didn't state domain and equation. Study design specifically says when a function is required a rule and domain must be given. No leniency whatsoever.

where in the study design does it say this?

[dezz]

how many marksyou think ill lose for using .6 instead of .06 on the approximation question?
dont know how i managed that.
argh, my blindness.
but yea paper was pretty easy, finished in 25minutes. argh hope i dont loose to many marks for the approximation.

[NE2000]

OK stop raging at TT

http://www.vcaa.vic.edu.au/vce/studies/mathematics/methods/assessreports/2007/mm2_assessrep_07.pdf

Q4bi.

The question itself was specifically no more or more less than "find the inverse function h-1"

[charley]

On q6 did the depth mean anything for the related rates or was it just a bit of info that was irrelevent?