- #1

karush

Gold Member

MHB

- 3,269

- 5

$\displaystyle u=\sqrt{x}, \quad

\int_1^4\dfrac{e^{\sqrt{x}}}{\sqrt{x}}\, dx$

is equal to which of the following}$

$$

(A)2\int_1^{16} e^u \, du\quad

(B)2\int_1^{4} e^u \, du\quad

(C) 2\int_1^{2} e^u \, du\quad

(D) \dfrac{1}{2}\int_1^{2} e^u \, du\quad

(E) \int_1^{4} e^u \, du\

$$

By observation

$$\int_1^4\dfrac{e^u}{u}\, du$$ok I got this far but...