Question

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

1

-1

-5

Answer 1

keep in mind that \(\bf \cfrac{1}{x} \implies x^{-1}\)

Answer 2

how do i simplify x^-1..? @jdoe0001

Answer 3

@Ahmad1 ?

Answer 4

\[f(x)=\frac{ 5 }{ x } = 5(x)^{-1} \]
\[f \prime (x) = -5 (x)^{-2} = \frac{ -5 }{ x ^{2} }\] at x=1we get \[\frac{ -5 }{ 1 } = -5\]