AQA A2 Mathematics Pure Core 4 MPC4 - 17th June 2016

Say you have du/dx and you need to find the maximum or minimum rate of growth:

Imagine setting y=du/dx and plotting y

The maximum/minimum rate of growths are going to be stationary points so you can differentiate y (or in other words, differentiate du/dx) and equate to 0 to find stationary points. Where d^2u/dx^2 = 0 will give you those points, then you can differentiate it again (d^3u/dx^3) and plug those values in, if it is < 0 you have found the maximum and if it is > 0 you have found the minimum.

It will be a normal exam, just the standard questions.

Found it a rather generous paper, ( relative to the PC3, am I right?), very happy. - William Moore signing off.

Anyone else get 330 days for the half life question?

Posted from TSR Mobile

wasn't it 331 because it was 330 point something so it had to round up?

It's 330 because I got 330.01... and it was to the nearest day.