一个是7 另一个是9
因为分母通分得63 而且相邻奇数,一定是7和9
之和是16
两相邻正奇数的倒数之差为63分之2,问这两个奇数的和.
两相邻正奇数的倒数之差为63分之2,问这两个奇数的和.
数学人气：766 ℃时间：2020-05-14 09:25:30
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