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

### 17 thoughts on “CIE – 9709 Pure Mathematics 1, AS Level, Paper 12, May/June 2016 – Solution 9”

• May 9, 2016 at 7:54 pm

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?

• May 16, 2016 at 1:49 pm

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?

• May 16, 2016 at 1:51 pm

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

• May 18, 2016 at 6:25 am

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

• May 10, 2016 at 10:39 am

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?

• May 10, 2016 at 11:38 am

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