2(x-2)-3(4x-1)=9(1-x)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程:x(2X-3)+2x(x-1)=4x(x-2)+9
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(3x^2+9x+7)/(x+1)-(2x^2-4x+3)/(x-1)-(x^3+x+1)/(x^2-1)是不是错了?
1、x*(x+3)*(x+6)*(x+9)=68040 2、x*(x+1)*(x+2)*(x+3)*(x+4)=5544
-3x-[4x-(-9x+1/2)-2],
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) + ...+ 1/(x+2005)