# Given x^5 if x<0 and 2x + 1" if "x >= 0, how do you find f(-1)?

Jan 2, 2018

See a solution process below:

#### Explanation:

For $f \left(- 1\right)$, $x < 1$, therefore we use the formula:

$f \left(\textcolor{red}{x}\right) = {\textcolor{red}{x}}^{5}$

Substituting $\textcolor{red}{- 1}$ for $\textcolor{red}{x}$ gives:

$f \left(\textcolor{red}{- 1}\right) = {\textcolor{red}{- 1}}^{5}$

$f \left(\textcolor{red}{- 1}\right) = \textcolor{red}{- 1}$