Chapter 7.6, Problem 23E

B In Problems 17-26, evaluate each iterated integral. (See the indicated problem for the evaluation of the inner integral.)

23. ${\displaystyle {\int }_1^e{\displaystyle {\int }_1^{e^2}\frac{\ln x}{xy}dy}dx}$

(See Problem 13.)

13. (A) ${\displaystyle \int \frac{\ln x}{xy}dy}$

(B) ${\displaystyle {\int }_1^{e^2}\frac{\ln x}{xy}dy}$