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If roots of the equation (q-r)x^(2)+(r-p...

If roots of the equation `(q-r)x^(2)+(r-p)x+(p-q)=0` are equal then `p,q,r` are in

A

`1/p + l/r`

B

`1/p - 1/r`

C

p+r

D

pr

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The correct Answer is:
A
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