Cho : A= ($\frac{x-y}{\sqrt[]{x}- \sqrt[]{y}}$ – $\frac{x\sqrt[]{x}-y\sqrt[]{y}}{x-y}$): $\frac{x\sqrt[]{y}+y\sqrt[]{x}}{x+y+2\sqrt[]{xy}}$ a, Rút gọ

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Cho : A= ($\frac{x-y}{\sqrt[]{x}- \sqrt[]{y}}$ – $\frac{x\sqrt[]{x}-y\sqrt[]{y}}{x-y}$): $\frac{x\sqrt[]{y}+y\sqrt[]{x}}{x+y+2\sqrt[]{xy}}$
a, Rút gọn A
b, Chứng minh 0 { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": " Cho : A= ($ frac{x-y}{ sqrt[]{x}- sqrt[]{y}}$ - $ frac{x sqrt[]{x}-y sqrt[]{y}}{x-y}$): $ frac{x sqrt[]{y}+y sqrt[]{x}}{x+y+2 sqrt[]{xy}}$ a, Rút gọ", "text": "Cho : A= ($ frac{x-y}{ sqrt[]{x}- sqrt[]{y}}$ - $ frac{x sqrt[]{x}-y sqrt[]{y}}{x-y}$): $ frac{x sqrt[]{y}+y sqrt[]{x}}{x+y+2 sqrt[]{xy}}$ a, Rút gọn A b, Chứng minh 0




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