Question

Calc Help please! Problem attached

Answer 1

you need to find the 1st derivative

\[\frac{dF}{dr} \]

but before you do it, write the problem in index form

\[F(r) = 2.99 \times 10^{16}\times r^{-2}\]

when you get the derivative substitute r = 6.77 x 10^6 and then evaluate