2n/(3n+1)和(2n+2)/(3n+4)比大小
2个回答
两者相减:2n/(3n+1)-(2n+2)/(3n+4)
通分后,分子相减结果为:-20,为正数;
分子分母异号.结果为负数.
故可知:2n/(3n+1)
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