1.

A function defined by f(x)=(x^(2)-ax+1)/(x^(2)+ax+1),0ltalt2 Let g(x)=int_(0)^(e^(x))(f'(t))/(1+t^(2))dt Which of the following is true ?

Answer»

`gcancelc(x)` is POSITIVE on `(-oo,0)` and negativeon `(0,oo)`
`gcancelc(x)` is negative on `(-oo,0)` and positive on `(0,oo)`
`gcancelc(x)` is negative on `(oo,0)` and positive on `(0,oo)`
`gcancelc(x)` does not CHANGE sign on `(-oo,oo)`

Answer :B


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