Question

Find the derivative of f(x) = 5 divided by x at x = -1.

Answer 1

\[f(x)= \frac{ 5 }{ x }\]
\[f'(x) = \frac {-5} {x^2}\]
\[f'(-1) = \frac{-5}{(-1)^2} = \frac{-5}{1} = -5 \]