Chapter 7.6, Problem 21E

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

21. ${\displaystyle {\int }_1^5{\displaystyle {\int }_0^2\frac{x}{\sqrt{y+x^2}}dx}dy}$

(See Problem 11.)

11. (A) ${\displaystyle \int \frac{x}{\sqrt{y+x^2}}dx}$

(B) ${\displaystyle {\int }_0^2\frac{x}{\sqrt{y+x^2}}dx}$