### Home > APCALC > Chapter 7 > Lesson 7.2.3 > Problem7-78

7-78.

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 a $2$ out of the integral.

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

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

$a^0 = 1$