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纠错
Which of the following equations is true for all positive values of x and y?
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A.$$\sqrt{x}+\sqrt{y}=\sqrt{x+y}$$
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B.$$\sqrt{(x^4*y^16)}$$
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C.$$(x\sqrt{y})(y\sqrt{x})=x^{2}·y^{2}$$
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D.$$y\sqrt{x}+y\sqrt{x}=\sqrt{4xy^2}$$
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E.$$(x^y)(y^y)=(xy)^(2y)$$
D显示答案
