CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 9

- CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 8
- CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 10

CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 9

- CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 8
- CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 10

Hey for part i) b are you sure we have to use the nth term formula? Shouldn’t it be the sum formula? Anyone else agree?

yes, it’s the sn formula

Oh so it’s your mistake? 😀 thank God

yes 🙂

I wrote Sn=2000 and I got 40.5 but in the end I wrote 41 as all the water gets drained out through the day, will I lose any marks?

no

For question 10 I didnt write +k after integrating.. How many marks go?

just one

I wrote 230.4 for the volume in question 10.. Will I lose a mark?

Hello guys!

Why is it 41? I remember I got the answer as 40.44 so the rounding off would be 40! Am I wrong?

the answer was n greater or equal to 40.44, it can not be at the end of the 40th day as the amount of water lost will be something like 1960 not 2000.. so during the 41st day all the water will be lost.. during, not at the end

Is 17.75% the correct answer.? Shouldn’t it have been 92…%

they ask you the percentage left, not the one lost

if i wrote n=40.4 will i get marked down

yes, you lose 1 mark