1.

int (2x+2)/(sqrt(x^2-4x-5))dx=

Answer»

`SQRT(x^2-4x-5)+log|x+sqrt(x^2-4x-5)|C`
`log|sqrt(x^2-4-5)|+sqrt(x^2-4x-5)+c`
`sqrt(x^2-4x-5)+6log|(x-2)+sqrt(x^2-4x-5)|+c`
`2sqrt(x^2-4x-5)+6log|(x-2)+sqrt(x^2-4x-5)|+c`

ANSWER :D


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