1.

If alpha,beta be the roots of x^(2)-a(x-1)+b=0, then the value of (1)/(alpha^(2)-a alpha)+(1)/(beta^(2)-a beta)+(2)/(a+b) is

Answer»

`(4)/(a+b)`
`(1)/(a+b)`
0
`-1`

ANSWER :C


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