If
1/2▽3 = 1/2 x 1/3 x 1/4
1/3▽4 = 1/3 x 1/4 x 1/5 x 1/6
1/7▽2 = 1/7 x 1/8
find 1/2▽4.
Maths(f.1-f.2)
2007-09-01 6:31 am
回答 (1)
收錄日期: 2021-04-13 16:31:12
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