Calc2.140

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Find the derivative of f(x)=x^2\sqrt{9-x^2}\,.


f'(x)=2x\sqrt{9-x^2} + x^2\frac{1}{2}(9-x^2)^{-1/2}(-2x)\,

=2x\sqrt{9-x^2} -x^3(9-x^2)^{-1/2}\,


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