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 11

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 11

Hey,

In part ii I forgot to take underoot of 4 and proceeded by substituting -4 in double deferential, answer was -1/4, and I stated it’s maximum. Can you please tell me how many marks am I gonna lose?

you have one point lost for not getting x(m)=2, you will lose 1-2 more for the coordinates of the other point, but you will get marks for the method of finding the nature.. so around 2-3 marks will be lost

Ohk thanks.

I found the M coordinate correctly but used the same value to find the nature of the stationary point, i didn’t show any working for finding the coordinate of the other stationary point and didnt find the other coordinate. I didnt use -2 I used +2 so I got minimum instead of maximum although I did substitute values in the double differentiation formula, how many marks will i lose? So I got x is +/- 2 I got M is 2,8 and I substituted +2 in the double differentiation formula and got minimum, how many marks go?