### Home > CALC > Chapter 7 > Lesson 7.1.5 > Problem7-56

7-56.

Multiple Choice: Evaluate the expression $\int _ { 0 } ^ { 400 } ( 5 ^ { x } - 2 ^ { x } ) d x + \int _ { 1 } ^ { 400 } ( 2 ^ { x } - 5 ^ { x } ) d x$.

1. $0.000$

1. $≈ 1.043$

1. $≈ 0.221$

1. $≈ 1.820$

1. $+∞$

Factor a ($−1$) out of the second integral and see what happens.