Suggested Answers to the HSC 2016 Mathematics Exam (+Discussion!)

[itsAnuu]

And also, for calculating the distance traveled by the particle, For |2t - 4ln(t+1)|, l let it accidentally be 2t + 4ln(t+1), my other integral of above the x-axis was correct tho. How many marks would I lose for this as I ended up getting answer wrong

[jamonwindeyer]

Hey! For that dice question, how many marks would I lose for finding n = 11 and in the formula using r to the power of n, instead of r to the power of n-1

1

Just for the record, everyones corrections put my mark down to about 93/100, if it gets to 90 you all win

[lha]

So is the last question y=100? Because I got y=200 ((

[browny2409]

You haven't included answers for Qtn 14 D and E

Also RE Qtn 16 b ii - isn't the range 10≤y<200 given that you found y=10 when t=0 and t has to be greater than zero??

[ml125]

Also RE Qtn 16 b ii - isn't the range 10≤y<200 given that you found y=10 when t=0 and t has to be greater than zero??

Yeah pretty sure it's 10≤y<200

[jamonwindeyer]

And also, for calculating the distance traveled by the particle, For |2t - 4ln(t+1)|, l let it accidentally be 2t + 4ln(t+1), my other integral of above the x-axis was correct tho. How many marks would I lose for this as I ended up getting answer wrong

Hmm, that's a tough one. It would either be one mark or two marks lost. It shows a conceptual miss, OR an algebraic error, depending on how you look at it. I'm not sure

[itsAnuu]

Last one sorry :'D. For 14d, would I get 1 mark for summing the series at least?

[jamonwindeyer]

Yeah pretty sure it's 10≤y<200

LOL, that one was correct, but I've added a bracket or something to the back and it looks like zero. No idea what happened there. I'll tidy it up!

Last one sorry :'D. For 14d, would I get 1 mark for summing the series at least?

Yep!

[MysteryMarker]

For Q 14 e, I had 9log32, so i had different integers for a and b. This still yields the correct answer but just curious as to whether strictly 45log2 is correct. Also could you explain to me why n=12 for question 15b.

[Bilsin]

Anyone else use a cheeky method for the very last question?

[jamonwindeyer]

For Q 14 e, I had 9log32, so i had different integers for a and b. This still yields the correct answer but just curious as to whether strictly 45log2 is correct. Also could you explain to me why n=12 for question 15b.

Your version is correct as well! They'd accept both.

Did you sum 'n' terms, or 'n-1' terms? It's supposed to be 'n-1', I made the mistake too

[itsAnuu]

Predictions on what a raw 88 will scale to?

[bobby shmurda]

what would be a band 5 cut off

[samsam0001]

For Q 14 a) shouldn't the simpsons rule be h/3 (first + last + 4(0dd) + 2(even) )?

[Lockyb98]

For Q12 d) (ii) - since you multiply by 3 to get it into the form required, would you not then have to multiply by 1/3 to cancel it out? So it would become 1/3 (integral from 0 -> 2 of) e^3x (1 + 3x)?

Thanks for being so quick on the paper and answer upload!