First slide

Evaluation of definite integrals

Question

_{$\int_{- π}^{π} x^{3} C o s x d x =$}

Easy

A

1
B

0
C

–1
D

_$π$

Solution

$I = \int_{- π}^{π} x^{3} C o s x d x$
$f (- x) = - f (x)$ $\Rightarrow f (x) i s o d d f u n c t i o n$
$∴ I = 0$

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