Chứng minh số học

N

nguyenbahiep1

[laTEX]a - b < 0 \Rightarrow (\sqrt{a})^2 - (\sqrt{b})^2 < 0 \\ \\ (\sqrt{a}-\sqrt{b})(\sqrt{a}+\sqrt{b}) < 0 \\ \\ \sqrt{a}+\sqrt{b} > 0 \Rightarrow \sqrt{a}-\sqrt{b} < 0 \\ \\ \Rightarrow \sqrt{a} < \sqrt{b} \Rightarrow dpcm[/laTEX]
 
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