Question:
Mark $(\sqrt{ })$ against the correct answer in each of the following:
$\int \frac{\mathrm{dx}}{\sqrt{\mathrm{x}^{2}-16}}=?$
A. $\sin ^{-1}\left(\frac{x}{4}\right)+C$
B. $\log \left|x+\sqrt{x^{2}-16}\right|+C$
C. $\log \left|x-\sqrt{x^{2}-16}\right|+C$
D. none of these
Solution:
