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5/1X2+5/2X3+5/3X4+5/4X5.+5/48X49+5/49X50=?
1个回答
相关问题
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1*2/5+2*3/5+3*4/5+……+48*49/5+49*50/5
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1/1x2+1/2x3+1/3x4+1/4x5+.1/49x50
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2x1/3+3x1/4+4x1/5+````````+49x1/50等于多少?
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x:3=7/8:1/49:x=4.5/0.81/6:2/5=1/2:2x3/8:x=5%:0.6
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1*2+2*3+3*4+4*5+5*6+……48*49+49*50
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因式分解：(1)2x^2-4x-3 (2)x^2-5x+5 解方程：（2x-1)^2-49=0
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1\1x2x3+1\2x3x4+1\3x4x5+``````+1\48x49x50注：(\)为分数线(x)为乘号
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21+4x=49 2/3x×3/5=8 6x-3/2x=54 3.7-0.5x=16 2.4x-2.8=3.2 3x-5
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1 5@2=5+5=11 5@3=5+6+7=18 2@5=2+3+4+5+6=20 若(x@3)@2=49 x的值
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5/1x+49÷5/1=3/2x怎么解