36/144,84/144, 132/144, 180/144, 每个分子比前一个分数的分子按这个规律加大:+48, +84, +48.......那么,下一个分子应该加84, 这个分数就该是229/144 也就是 19/12
36/144,84/144, 132/144, 180/144, 每个分子比前一个分数的分子按这个规律加大:+48, +84, +48.......那么,下一个分子应该加84, 这个分数就该是229/144 也就是 19/12
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