int (x^2+2x+4)/((x+1)sqrt(x^2+1)) dx...

`int (x^2+2x+4)/((x+1)sqrt(x^2+1)) dx`

Answer

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int(x^2-1)/(x^3sqrt(2x^4-2x^2+1)) dx is equal to :

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

`(sqrt(2x^4-2x^2+1))/(x^3)+c`

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

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

int(x^4-1)/(x^2sqrt(x^4+x^2+1))dx =

`sqrt(x^2+1/x^2+1)`

`(sqrt(x^4+x^2+1))/x`

`sqrt((x^4+x^2+1)/x)`

none of these

int1/((x-1)sqrt(x^(2)-4))dx=

`-1/sqrt(5)logabs(1/(x-1)+1/5+sqrt((x^(2)+4)/(x-1)^(2)))+c`

`-1/sqrt(5)logabs(1/(x-1)+1/5+sqrt((x^(2)+4)/(5(x-1)^(2))))+c`

`-1/sqrt(5)logabs(1/(x-1)+1/5sqrt((x^(2)+4)/(x-1)^(2)))+c`

None of these