### Home > CALC > Chapter 7 > Lesson 7.2.3 > Problem7-85

7-85.

Integrate.

1. $\int - \frac { 2 } { x } d x$

Before you integrate, factor the coefficient $−2$ out of the integral.

1. $\int ( \frac { 2 } { \sqrt { 1 - x ^ { 2 } } } + 4 x ) d x$

Before you integrate, factor the coefficient $2$ out of the integral.

Do you recognize a familiar trig (or inverse trig) derivative in the integrand?

1. $\int _ { 0 } ^ { \pi } \pi ^ { x } d x$

$a^0=1$