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If p,q,r are three positive real number ...

If p,q,r are three positive real number are in AP , then the roots of the quadratic equation `px^2+qx+r=0` are all real for

A

`abs(r/p-7)ge4sqrt3`

B

`abs(p/r-7)lt4sqrt3`

C

all p and r

D

no p and r

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The correct Answer is:
A
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