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A quadratic equation f(x)=a x^2+b x+c=0(...

A quadratic equation `f(x)=a x^2+b x+c=0(a != 0)` has positive distinct roots reciprocal of each ether. Then

A

`f(1)=0`

B

`af(1)lt0`

C

`af(1)gt0`

D

Nothing can be said about a f (1)

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