### Home > APCALC > Chapter 3 > Lesson 3.2.2 > Problem3-60

3-60.

Write an equation for $f^\prime (x)$ for each function below.

1. $f(x) = \frac { 9 } { x }$

$f(x)=\frac{9}{x}=9x^{-1}$

$f'(x)=\underline{ \ \ \ \ \ \ \ \ \ \ }$

1. $f(x) = −3x^7 − 6x$

Use the Power Rule.

$f^\prime (x) = −21x^6 − 6$

1. $f(x) = 5x^{–4}$

Refer to hint in part (b).

1. $f(x) = m$

$m$ is a constant. What is the slope of the a
horizontal line $y = m$?