We will use the product rule, which states that if $Y(u) = f(u)g(u)$, then $Y'(u) = f'(u)g(u) + f(u)g'(u)$.
Let $f(u) = u^{-2} + u^{-3}$ and $g(u) = u^5 - 9u^2$.
Then $f'(u) = -2u^{-3} - 3u^{-4}$ and $g'(u) = 5u^4 - 18u$.
Now, we can apply the product
Show more…