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The maximum value of `xy` subject to `x +y=8` is :A. 8B. 16C. 20D. 24 |
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Answer» Correct Answer - B `x+y=8` `A=xy` `A=x(8-x)` `A=8x-x_(2)` `(dA)/(dX)= 8-2x` `x =4` `y =4` `A= xy = 16`. |
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