1.

If y= log ((1-x^(2))/(1+ x^(2))), then (dy)/(dx) is equal to _______

Answer»

1)`(-4x^(3))/(1-x^(4))`
2)`(1)/(4-x^(4))`
3)`(4x^(3))/(1-x^(4))`
4)`(-4x)/(1-x^(4))`

Answer :D


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