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int(dx)/(sqrt(x^2-8x-20))=...

`int(dx)/(sqrt(x^2-8x-20))=`

A

`log|x+4-sqrt(x^2-8x-20)|+c`

B

`log|x-4+sqrt(x^2-8x-20)|+c`

C

`log|x-4-sqrt(x^2-8x-20)|+c`

D

`log|x+4+sqrt(x^2-8x-20)|+c`

Text Solution

Verified by Experts

The correct Answer is:
B
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