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int dx/((x^(2)+1)(x^(2)+4))= k tan^(-1) ...

`int dx/((x^(2)+1)(x^(2)+4))= k tan^(-1) x + l (tan^(-1)) x/2` then

A

k = 2/3

B

l = 2/3

C

k = -2/3

D

l = -1/6

Text Solution

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The correct Answer is:
D
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