Answer
$A= \dfrac{2}{5} $
Work Step by Step
$f(x) = x^4$ $ [-1,1] $
$A =\int_{-1}^1 x^4 dx $
$A = [\frac{x^5}{5}]^1_{-1} $
$A = [(\frac{1^5}{5})-(\frac{(-1)^5}{5})] $
$A = [\frac{1}{5} - (-\frac{1}{5})] $
$A = \dfrac{2}{5} $
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