已知1/2x3=1/2-1/3,1/3x4=1/3-1/4,.计算1/2x3+1/3x4+1/4x5+1/5x6.

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已知1/2x3=1/2-1/3,1/3x4=1/3-1/4,.计算1/2x3+1/3x4+1/4x5+1/5x6.

已知1/2x3=1/2-1/3,1/3x4=1/3-1/4,.计算1/2x3+1/3x4+1/4x5+1/5x6.
已知1/2x3=1/2-1/3,1/3x4=1/3-1/4,.计算1/2x3+1/3x4+1/4x5+1/5x6.

已知1/2x3=1/2-1/3,1/3x4=1/3-1/4,.计算1/2x3+1/3x4+1/4x5+1/5x6.
1/2x3+1/3x4+1/4x5+1/5x6
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6
=1/2-1/6
=1/3

5/6
就是1-1/6

1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6=1/2-1/6=1/3