把20,26,33,35,39,42,44,55,91等9个数分成三组,使每组的数的乘机相等.
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![把20,26,33,35,39,42,44,55,91等9个数分成三组,使每组的数的乘机相等.](/uploads/image/z/207807-15-7.jpg?t=%E6%8A%8A20%2C26%2C33%2C35%2C39%2C42%2C44%2C55%2C91%E7%AD%899%E4%B8%AA%E6%95%B0%E5%88%86%E6%88%90%E4%B8%89%E7%BB%84%2C%E4%BD%BF%E6%AF%8F%E7%BB%84%E7%9A%84%E6%95%B0%E7%9A%84%E4%B9%98%E6%9C%BA%E7%9B%B8%E7%AD%89.)
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把20,26,33,35,39,42,44,55,91等9个数分成三组,使每组的数的乘机相等.
把20,26,33,35,39,42,44,55,91等9个数分成三组,使每组的数的乘机相等.
把20,26,33,35,39,42,44,55,91等9个数分成三组,使每组的数的乘机相等.
20.33.91
26.42.55
35.39.44
把这几个数字分解因式,看出几个相同的因式就可以解决了..
晕啊,做一个上午数学题了..