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Mathematics
Problem
Evaluate the definite integrals in Exercises 1 to 20. 20.
∫
0
1
(
x
e
x
+
sin
π
x
4
)
d
x
\int_{0}^{1}\left(x e^{x}+\sin \frac{\pi x}{4}\right) d x
∫
0
1
(
x
e
x
+
sin
4
π
x
)
d
x
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