Question

In Problems 15–26, determine which functions are polynomial functions. For those that are, state the degree. For those that are not, tell

why not.

$f\left(x\right)=4x+x^3$

Short answer

$f$ is a polynomial of degree$3$

Step-by-step solution

Given information

$f\left(x\right)=4x+x^3$

Calculation

$f\left(x\right)=4x+x^3$

$f$is a polynomial of degree$3$