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प्रश्न
Choose the correct alternative:
The value of `int_(-4)^4 [tan^-1 ((x^2)/(x^4 + 1)) + tan^-1 ((x^4 + 1)/x^2)] "d"x` is
पर्याय
`pi`
`2pi`
`3pi`
`4pi`
उत्तर
`4pi`
APPEARS IN
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