Question

A need help on the attachment

Answer 1

ok well y=|x|=sqrt(x^2) soo y= (x^2)^(1/2) so y'= 1/2(x^2)^(-1/2) times 2x which equals x/sqrt(x^2) which is the same as x/|x|

Answer 2

i hope you understood that first part cus that's all i know :P

Answer 3

you don't know how to do part b or c