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[" Let "f(x)" be a differentiable functi...

[" Let "f(x)" be a differentiable function on "R" such that "],[2f(x1y)" । "f(xquad y)=3f(x)" । "3f(y)" । "2xy" for all "x,y in R" .If "f'(0)=0" then the value "],[" of "f(3)" is "]

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