已知1x2/1=1-2/1,2x3/1=2/1-3/1 ,3x4/1=3/1-4/1 ,4x5/1=4/1-5/1计算5x6/1+6x7/1+7x8/1+8x9/1...+47x48/1+48x49/1+49x50/1
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![已知1x2/1=1-2/1,2x3/1=2/1-3/1 ,3x4/1=3/1-4/1 ,4x5/1=4/1-5/1计算5x6/1+6x7/1+7x8/1+8x9/1...+47x48/1+48x49/1+49x50/1](/uploads/image/z/2593832-32-2.jpg?t=%E5%B7%B2%E7%9F%A51x2%2F1%3D1-2%2F1%2C2x3%2F1%3D2%2F1-3%2F1+%2C3x4%2F1%3D3%2F1-4%2F1+%2C4x5%2F1%3D4%2F1-5%2F1%E8%AE%A1%E7%AE%975x6%2F1%2B6x7%2F1%2B7x8%2F1%2B8x9%2F1...%2B47x48%2F1%2B48x49%2F1%2B49x50%2F1)
已知1x2/1=1-2/1,2x3/1=2/1-3/1 ,3x4/1=3/1-4/1 ,4x5/1=4/1-5/1计算5x6/1+6x7/1+7x8/1+8x9/1...+47x48/1+48x49/1+49x50/1
已知1x2/1=1-2/1,2x3/1=2/1-3/1 ,3x4/1=3/1-4/1 ,4x5/1=4/1-5/1
计算5x6/1+6x7/1+7x8/1+8x9/1...+47x48/1+48x49/1+49x50/1
已知1x2/1=1-2/1,2x3/1=2/1-3/1 ,3x4/1=3/1-4/1 ,4x5/1=4/1-5/1计算5x6/1+6x7/1+7x8/1+8x9/1...+47x48/1+48x49/1+49x50/1
题目中你的分数的书写,分子分母的位置应该换一下.=1/5-1/6+1/6-1/7+1/7-1/8……+1/48-1/48+1/49-1/50=1/5-1/50=9/50