Originally Posted by

**appleibeats**
Thanks for that help.

Also I don't quite understand how to get the answers to the questions in 4 in 7J.

I know how to sketch them and their continuity, but am unsure about how to find where it is not differentiable.

eg, question 4a)

y = |x + 2 |

Also, question 7d from chapter 8A.

write down the general form of a monic quadratic for which one of the zeroes is x = 1. (I know how to do this.) Then find the equation of such a quadratic in which :

d) the curve passes through (3,9).

Thank you.

## Bookmarks