2x-3/x-1=4x-1/2x+3等于多些

(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? (x+1)(x+2)(x+3)(x+4)等于多少 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || (x-1)(x-2)(x-3)(x-4)=0,求x等于多少, 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 3(4x+1)-2(x-3)=3x(x+5)-3x^2-1则x等于 -x^3+x^2-1/4x等于多少? X^2+3X+1=0 X等于多少? 先化简,再求值:5x(x的平方+2x+1)-x(x-4)(5x-3),x等于1 x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)...(x-49)等于多少? x/3+2+[x-(x/3+2)]/2-1+38=x X等于多少? [x(3-4x)+2x^2(x-1)]/(-2x)等于多少, 设f(x)={1/x x＞2,3x-2 x小于等于-2 已知函数f(x)=2^-x(x大于等于3) f(x+1)(x (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x