1/5X1/8+1/8X1/11+1/11X1/14+.+1/98X1/101
=1/3x(1/5-1/8)+1/3x(1/8-1/11)+...+1/3(1/98-1/101)
=1/3(1-1/101)
=100/303
1/5X1/8+1/8X1/11+1/11X1/14+.+1/98X1/101=
1个回答
相关问题
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计算:1/5x8加1/8x11加1/11x4.… 1/98x101怎么算?加上讲解
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1/（5*8）+1/（8*11）+1/（11*14）+L+1/（98*101）答案,以及L的含义
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[1/(x-1)(x+2)]+[1/(x+2)(x+5)]+[1/(x+5)(x+8)]+[1/(x+8)(x+11)]
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1X1/6+6X1/11+11X1/16……+101X1/106=?
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1/2*5+3*1/5*8+5*1/8*11+7*1/11*14+.+99*1/101*104=
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1/2X5 + 1/3X5 + 1/8X11 + .+1/20X23 =
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(8x+4)/5=(11x+1)/7+1
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(8x+4)/5=(11x+1)/7+1.