7/11×7/8-5/12×7/11
=7/11*(7/8-5/12)
=7/11*11/24
=7/24
1/15×13/17-8/17×1/15
=1/15*(13/17-8/17)
=1/15*5/17
=1/51
7/11×7/8-5/12×7/11 ------------------------------ 1/15×13/17-8/17×1/15 递等式计算.
7/11×7/8-5/12×7/11 ------------------------------ 1/15×13/17-8/17×1/15 递等式计算.
数学人气:510 ℃时间:2019-08-11 21:51:33
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