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（1+1/2）x（1+1/4）x（1+1/6）x（1+1/8）x（1+1/10）x（1-1/3）x（1-1/5）x（1-
3个回答
相关问题
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1/1*2x+1/2*3x+1/3*4x+1/4*5x+1/6*7x+1/7*8x+1/8*9x+1/9*10x=1/1
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(1+1/2)x(1+1/4)x(1+1/6)x...x(1+1/10)x(1-1/3)x(1-1/5)x..x(1-1
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3x-1/4-5x-1/6=9x+1/8+1 2(x+1)+1/3-2-3(x+1)/4=x
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1/1x3+1/2x4+1/3x5+1/4x6+...+1/10x12
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简算题：1x2/1+2x3/1+3x4/1+4x5/1+5x6/1+6x7/1+7x8/1+8x9/1
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1/4x-1/2=3/4;7x-5/4=3/8；2x-1/6=5x+1/8；1/2x-7=9x-2/6；1/5x-1/2
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-2/5X+1=X+1/10 X-1/3-1=X/2+1 3X+1/4-2(X+1)/3=1
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1/1x2x3x4+1/2x3x4x5+1/3x4x5x6+1/4x5x6x7+1/5x6x7x8+1/6x7x8x9+
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简便计算题1x1/2+1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6+1/6x1/7
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（1）2x=1/4 （2）1/3x-1/6x=6 (3)x-1/4x=3:8