比较下列各组中两个代数式的大小: (1)x2+3与3x ; (2)已知a,b为正 发布时间:2017-05-12 12:48 │ 来源:www.tikuol.com 题型:计算题 问题: 比较下列各组中两个代数式的大小:(1)x2+3与3x ;(2)已知a,b为正数,且a≠b,比较a3+b3与a2b+ab2。
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