1-0.5x/0.3-2/3x=0.3x/0.2x+1
1-0.5x/0.3-2/3x=0.3x/0.2x+1
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x-2/0.2-x+1/0.5=3 x=?
1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6
3x-2(4x+8)=2.4 6.5-(x+1.3)=2.2 0.2(x-4)=0.3(x-1
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
(1)3x(x+0.2)=4x(x-1.1)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
f(x-1)=x^2-2x+3(x