1.

If y =cot^(-1) (1-x+x^2) , then (dy)/(dx) =

Answer»

`1/(1+x^2)+1/(1+(x-1)^2)`
`1/(1+(x-1)^2)+1/(1+x^2)`
`1/(1+x^2)-1/(1+(x-1)^2)`
`1/(""^(-)1+x^2)-1/(1+(x-1)^2)`

ANSWER :C


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