### Home > INT1 > Chapter 4 > Lesson 4.2.3 > Problem4-90

4-90.

If $f(x)=4^x+1$, calculate each of the following values.

1. $f(0)$

• What is $4^0$ equivalent to?

1. $f ( \sqrt [ 3 ] { - 27 } )$

${\text{Evaluate }\sqrt[3]{-27}\text{ and then}}$

$\text{substitute in for }x.$

1. $x \text{ if }f(x)=17$

• Substitute $17$ for $f(x)$ and solve for $x$.