Further Math Exam 1: Answers + Discussion!

[DanielJ]

wouldn't question 2 be C? for matrices:/ doesnt make sense

Left matrix is a 3*2, right is 3*1. Can't multiply them

[IntelxD]

So you guys think that the cut off for A+ will be 37 again? Some years it has been 36

Honestly it's very difficult to predict what the cut off will be for further exams, specifically exam 1. I believe it will be 37 again however I wouldn't be surprised if it were 36.

[nugz]

Honestly it's very difficult to predict what the cut off will be for further exams, specifically exam 1. I believe it will be 37 again however for I wouldn't be surprised if it were 36.

Mmm yeah I agree. Also hard to predict how well you'll go considering it's so competitive!

[DanielJ]

Honestly it's very difficult to predict what the cut off will be for further exams, specifically exam 1. I believe it will be 37 again however for I wouldn't be surprised if it were 36.

Average since 2006 has been 36.57. So it can go either way.

[SarahLoria]

Is anyone able to scan their copy of the exam through? I don't have mine with me and it would be great to check answers

[soysauce]

Is anyone able to scan their copy of the exam through? I don't have mine with me and it would be great to check answers

https://drive.google.com/folderview?id=0ByQLc1BiRWP1cUE1ZWlQa0NBVWs&usp=sharing

[Manolya.i]

okay so I'm not really good at further, and i just want to get an average mark possibly 20, what do you reckon my exam mark needs to be?

[QTPi]

Can someone please explain why Q9 for Buisness is E and not D?

[demand&supply]

thanks for the solution 
but just to make sure, is question 9 on Business Module 100% E? cos a lot of ppl had D and its confusing me.

[demand&supply]

Can someone please explain why Q9 for Buisness is E and not D?

I got E and this is my reason. After the 47th payment, you still owe $802.39 and need to repay it. But by the 48th payment, you have to repay that and the interest added on that reduced balance, hence $805.57 (E). Thats how I see it, hope someone smarter than me can explaining it better 

[clidedescope]

Did anyone else find this year harder than recent years?

I did, but I think it was partially due to the stress of actually being in my exam, you know? There's not nearly as much pressure in practise exams.

[clidedescope]

I got E and this is my reason. After the 47th payment, you still owe $802.39 and need to repay it. But by the 48th payment, you have to repay that and the interest added on that reduced balance, hence $805.57 (E). Thats how I see it, hope someone smarter than me can explaining it better 

You explained it perfectly. If you chose D, then you would have been ignoring the added interest for that month's repayment. E added it, so it was correct.

[AngelWings]

Option C is true, actually.
Try this: Chuck the sequence in a column on a spreadsheets page. In the column next to the sequence, multiple each Dn value by 0.4 (=a1*0.4 and drag this for all cells).
This never reaches 200, therefore showing that the amount leaving her body is always below 200.

Yes, my annotations say likewise. Using the equation: r would have to be equal to or greater than 1, in order for that to be NOT true, as the question states.

Are we sure that question 13 core is option C Cause thats what I did and I don't want it to be wrong!

Spoiler

Using our lovely Core Module friend, the gradient formula: m= rise/ run
There are 16 points, as stated above and by counting like a Prep student. Dividing this into its 3 sections, as the three median method requires, we have 5 points on the left and right sections, 6 in the middle section.
The gradient comes from the left and right medians. Their coordinates work out to be roughly (3,8) and (14,8).
Taking the gradient of that, it's 0.
Thus, my answer is C.

@ nugz: Dumb mistakes = Why Further? Whyyyyyy?
Overall, did better than my practice exams (because they too were dumb mistakes), which counts for something.

okay so I'm not really good at further, and i just want to get an average mark possibly 20, what do you reckon my exam mark needs to be?

Not sure. By using this: http://www.vcaa.vic.edu.au/Documents/statistics/2013/section3/vce_further_mathematics_ga13.pdf
I would assume about 13-14 questions correct?
Sorry, my estimations are horrible.

[soysauce]

Anyone able to explain trig q6 please?

[AngelWings]

Anyone able to explain trig q6 please?

Sure, Soysauce.
Try the cosine rule and add the 140 degrees that's there.
I'll explain it better in a minute. Just give me the okay.