0.3(x+1)+0.25(100-x)=2/5x
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0.3(x+1)+0.25(100-x)=2/5x
0.3(x+1)+0.25(100-x)=2/5x
0.3(x+1)+0.25(100-x)=2/5x
原方程可休为 3(x+1)/10+(100-x)/4=2x/5
去分母得 6(x+1)+5(100-x)=8x
去括号得 6x+6+500-5x=8x
移项得 8x-x=500+6
合并得 7x=506
系数化1得 x=506/7
0.3(x+1)+0.25(100-x)=2/5x
0.3X+0.3+25-0.25X=2/5x
0.05x-2/5x=-25.3
-7/20x=-25.3
x=506/7
0.3(x+1)+0.25(100-x)=2/5x
x(x-1)(x-2)...(x-99)(x-100)
0.3x+7x-0.25x=21.15 x+7=2x+3 1.2x+1=0.01x+三分之五 4x-26=3x+4 6x+2=5x+110.3x+7x-0.25x=21.15x+7=2x+31.2x+1=0.01x+三分之五4x-26=3x+46x+2=5x+114(x+1)=x+10
(X+X)+(X-X)+(X*X)+(X/X)=100
x-0.25x+1=10.4x+0.25x-1
x/x+(1-x)/x-1/x
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+...+1/(x+100)(x+101)
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
x=1+0.5x+0.25x+0.125x+0.0625x求x的值
计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)
设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X)
f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100)
计算:1/(x+3)(x+4)+1/(x+4)(x+5).1/(x+99)(x+100)
计算1/x(x+2)+1/(x+2)(x+4)+…+1/(x+98)(x+100)
0.3x+7x-0.25x=21.58.7×(36-x)=04(不知道是x还是× 都解了吧)x或者×(x+0.2)=1.27(x+6)-3x=4x(2x+5)3(x+2)=4(x+1)18-4x=2x-63.8x+1.2x=256x+1.5x=15呼呼.累死我了 着急