1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1
则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?
人气:387 ℃ 时间:2020-04-06 18:47:51
解答
已知:1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1两边同时减1/2得:1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1/2-(1/5+1/8+1/11+1/20+1/41+1/110+1/1640)=-1/21/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=1/2-(1...
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