P^2/QR+Q^2/PR+R^2/PQ
 = (P^3+Q^3+R^3)/PQR
 = ((P+Q+R)(P^2+Q^2+R^2-PQ-QR-PR)+3PQR)/PQR
 = 3

On 2011-9-15 13:29, rahul sharma wrote:
hw?

On Thu, Sep 15, 2011 at 10:57 AM, Tamanna Afroze <[email protected] <mailto:[email protected]>> wrote:

    yah the ans is 3

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