Question

If P(x) is the total value of the production when there are x workers in a plant, then the average productivity of the work-force of the plant is.
A(x)=p(x)/x

Answer 1

Show that A'(x) > 0 if p'(x) is greater than the average productivity

Answer 2

I know that A'(x) is \[x*p'(x) - p(x) \over x ^{2}\]

And now after this I'm clueless