1.

int(dx)/((x-1)^(2)(x^(2) +1))=

Answer»

`log_(E) sqrt(X +1) +(1)/(2) log_(e)sqrt(x^(2) +1) - (1)/(x +1)+C`
`log_(e) sqrt(x +1) -(1)/(2) log_(e)sqrt(x^(2) +1) - (1)/(2(x +1))+c`
`(1)/(2) log_(e) sqrt(x +1)-(1)/(4) log_(e) sqrt(x^(2) +1)+(1)/(2(x-1))+c`
`(1)/(4)log_(e) sqrt(x+1)+(1)/(2) log_(e) sqrt(x^(2)+1)+(1)/(x+1)+c`

ANSWER :B


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