Question

Decide whether the integral can be evaluated using integration by parts, u substitution, both, or neither

Answer 1

\[\int\limits x \sqrt{1-x ^{2}} \]
\[\int\limits \frac{ 1 }{ \sqrt{1-x ^{2}} }\]
\[\int\limits \frac{ x }{ \sqrt{1-x ^{2}} }\]
\[\int\limits \frac{ 1 }{ x \sqrt{1-x ^{2}} }\]