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Mathematics
Mathematics
Problem
Evaluate
I
n
=
∫
d
x
(
x
2
+
a
2
)
n
I_n = \textstyle \int \frac{dx}{(x^2 + a^2)^n}
I
n
=
∫
(
x
2
+
a
2
)
n
d
x
.
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