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数学
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如果a√ a+b√ b>a√ b+b√ a成立,则a,b应满足的条件是()
人气:172 ℃ 时间:2020-09-02 21:01:02
解答
a√ a+b√ b
=(√ a)³+(√ b)³
=(√a+√b)(a+b-√a√b)
>=(√a+√b)(√a√b)
=a√ b+b√ a
等号成立的条件是a=b
所以a,b应满足的条件是(a不等于b)
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