1/24+1/120+1/360+1/840=(1/24)(1+1/5+1/15+1/35)=(1/24)*(105+21+7+3)/105=(1/24)*(136/105)=17/315
1/24+1/120+1/360+1/840的解法,
3个回答
相关问题
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1/3+1/8+1/15+1/24+...+1/360=
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1*2*3*4+1=24+1=5*5 2*3*4*5+1=120+1=11*11 3*4*5*6+1=360+1=19*
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24点解法3、1、4、6
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简便计算:1/8+1/24+1/48+1/120
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1+3[1/8]+5[1/24]+7[1/48]+9[1/80]+…+19[1/360].
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1/6+1/24+1/60+1/120+1/210+1/336=?
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解方程1-7*(1/18+1/24+1/30)=31/360对吗
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1/6+1/24+1/60+1/120+1/210的简便计算
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计算11/8+1/24+1/48+1/80+1/120
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(1/8+1/24+1/48+1/80+1/120+1/168)*56