1.

If p(q-r)x^(2) + q(r-p) x+ r(p-q) = 0 has equal roots, then (2)/(q)=

Answer»

<P>`(1)/(p)+ (1)/(R)`
`(1)/(p)- (1)/(r)`
`(1)/(r)- (1)/(p)`
`(1)/(PR)`

ANSWER :A


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