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Find minimum value of px+qy where p>0, q...

Find minimum value of `px+qy` where `p>0, q>0, x>0, y>0` when `xy=r,^2` without using derivatives.

A

`2r sqrt(pq)`

B

`2pqsqrtr`

C

`-2rsqrt(pq)`

D

none of these

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The correct Answer is:
A
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