### Home > APCALC > Chapter 10 > Lesson 10.3.1 > Problem10-135

10-135.

Demonstrate that the function $F ( x ) = \int _ { x } ^ { 4 x } \frac { 1 } { t } d t$ is constant for all positive values of $x$. Homework Help ✎

$F(x)=\ln(4x)-\ln(x)$

$F(x)=\ln\Big(\frac{4x}{x}\Big)$