) 1.(x+2)*3=(X-1)*4 2.2x=(50-x)+40 3.30x=(9-x)*24
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
1.x/9+x=62.x/x+1 + x+1/2x = 3
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
1、x*(x+3)*(x+6)*(x+9)=68040 2、x*(x+1)*(x+2)*(x+3)*(x+4)=5544
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980