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Mathematics
Problem
Evaluate
∫
−
a
a
x
∣
x
∣
d
x
\int_{-a}^{a} x|x| dx
∫
−
a
a
x
∣
x
∣
d
x
(1) 0 (2)
2
a
2a
2
a
(3)
2
a
3
3
\frac{2a^3}{3}
3
2
a
3
(4)
a
a
a
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