least value of an expression.

IIT JEE 2015 Tutorials › Algebra questions › least value of an expression.

$If $mn=1$, Then find Least value of $m^2+2mn-4n^2=$

#Mathematics #Algebra

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Abhisek ·2011-01-14 10:48:41

Can we just substitute m=1n and then differentiate the resulting equation ? [7]

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