(x+y)/2与(x+y)/xy用比商法怎么比较大小?就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..
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![(x+y)/2与(x+y)/xy用比商法怎么比较大小?就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..](/uploads/image/z/8773745-41-5.jpg?t=%EF%BC%88x%2By%29%2F2%E4%B8%8E%28x%2By%29%2Fxy%E7%94%A8%E6%AF%94%E5%95%86%E6%B3%95%E6%80%8E%E4%B9%88%E6%AF%94%E8%BE%83%E5%A4%A7%E5%B0%8F%3F%E5%B0%B1%E6%98%AF%E6%AF%94%E8%BE%83%E5%A4%A7%E5%B0%8F%2C%E4%B8%8D%E7%94%A8%E5%8A%A0%E5%87%8F%E6%B3%95%E6%AF%94%E8%BE%83%2C%E9%82%A3%E6%88%91%E4%BC%9A%2C%E4%BD%86%E7%94%A8%E6%AF%94%E5%95%86%E6%B3%95%E6%88%91%E4%B8%8D%E4%BC%9A%2C%E8%80%81%E5%B8%88%E8%AE%B2%E6%97%B6%E6%88%91%E6%B2%A1%E5%90%AC%E8%A7%81..)
(x+y)/2与(x+y)/xy用比商法怎么比较大小?就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..
(x+y)/2与(x+y)/xy用比商法怎么比较大小?
就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..
(x+y)/2与(x+y)/xy用比商法怎么比较大小?就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..
X+Y/2与XY/X+Y (X>O,Y>O) (X+Y)/2=(X+Y)^2/[2(X+Y)] =(X^2+2XY+Y^2)/[2(X+Y)] =(X^2+Y^2)/[2(X+Y)]+2XY/[2(X+Y)] XY/(X+Y)=2XY/[2(X+Y)] ∵(X^2+Y^2)/[2(X+Y)]+2XY/[2(X+Y)]>2XY/[2(X+Y)] ∴(X+Y)/2>XY/(X+Y)
(x+y)/2与(x+y)/xy用比商法怎么比较大小?就是比较大小,不用加减法比较,那我会,但用比商法我不会,老师讲时我没听见..
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