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If p,q,r , three positive real numbers a...

If p,q,r , three positive real numbers are in A.P., then the roots of `px^(2) + qx + r = 0` are all real for `:`

A

all a and c

B

no a and c

C

`|(c)/(a)-7| ge 4 sqrt(3)`

D

`|(a)/(c)+7| ge 2 sqrt(3)`

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The correct Answer is:
C
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