计算(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64

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计算(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64
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计算(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64
计算(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64

计算(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64
(1/2*4+1/4*6+1/6*8+1/8*10+1/10*12+1/12*14+1/14*16)*64
=1/*2(1/2-1/4+1/4-1/6+1/6-1/8+1/8-1/10+1/10-1/12+1/12-1/14+1/14-1/16)*64
=1/2*(1/2-1/16)*64
=14