int(dx)/(sqrt(x^(2)+2x+1))=Alog|x+1|+C, ...

`int(dx)/(sqrt(x^(2)+2x+1))=Alog|x+1|+C`, `x ne 1` then

A

`A=+-1`

B

`A=1` if `x gt -1`

C

`C in R`

D

`A=-1` if `x lt -1`

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