Let a real valued function is defined as f(x,y)=x2+y2−xy. If x2+4y2= – InterviewSolution

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1.	Let a real valued function is defined as f(x,y)=x2+y2−xy. If x2+4y2=4 and the range of f(x,y) is [a,b], then the value of ab is
Answer» Let a real valued function is defined as $f (x, y) = x^{2} + y^{2} - x y$ . If $x^{2} + 4 y^{2} = 4$ and the range of $f (x, y)$ is $[a, b]$ , then the value of $a b$ is

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