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int1/(x^2+8x+20)dx...

`int1/(x^2+8x+20)dx`

A

`(1)/(2)tan ^(-1)((x+2)/(2))+c`

B

`(1)/(2)tan ^(-1)((x+4)/(2))+c`

C

`(1)/(4)tan ^(-1)((x+2)/(4))+c`

D

`(1)/(4)tan ^(-1)((x+4)/(4))+c`

Text Solution

Verified by Experts

The correct Answer is:
B
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