12X*9(10-X)=1解方程

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12X*9(10-X)=1解方程12X*9(10-X)=1解方程12X*9(10-X)=1解方程12X*9(10-X)=11080x-108x^2=1108x^2-1080x+1=0x={1080±根

12X*9(10-X)=1解方程
12X*9(10-X)=1解方程

12X*9(10-X)=1解方程
12X*9(10-X)=1
1080x-108x^2=1
108x^2-1080x+1=0
x = {1080±根号(1080^2-4*108) } / (2*108) = { 90±根号(90^2-3) } / 3 = 30 ± (根号8097)/3
x1 = 30 - (根号8097)/3
x2 = 30 + (根号8097)/3

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程解方程:x(x-1)/1+x(x+1)/1…+(x+9)(x+10)/1=11?12解方程:x(x-1)/1+x(x+1)/1…+(x+9)(x+10)/1=11/12 12X*9(10-X)=1解方程解方程：1/x(x-1)+1/x(x+1)+1/(x+1)(x+2)+…+1/(x+9)(x+10)=1/12 解方程:1/[x(x+1)]+1/(x+1)(x+2)+1/(x+2)(x+3)+.+1/(x+9)(x+10)=5/12 解方程:1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+9)(x+10)=5/12 急 1/x(x+1)+1/(x+1)(x+2)+...+1/(x+9)(x+10)=1/(x+10),解方程解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 解方程:1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……+1/(x+9)(x+10)=0 解方程..9x+4=12(x-1/3) 10x+18=12（x-1）解方程方程x:30%x=9:1/10怎么解解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3（x/x-2 - 1-x²不是一起的!）2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8（5x/x²+x-6 - 5-2x不是一起的!）3、x-4/x-5 + x-8/x-9=x-7/x- 16^x+12^x=9x 解方程解方程：x-40%x+12=x-1/4 5x-(6+1)x=x-12解方程解方程：x（x-1）=8x-12 解方程x^2(x-1)(x-5)=-12