(x+1)/2=1-(2+3x)/3
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
f(x-1)=x^2-2x+3(x
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
(x+3)×(x+2)×(x+1)×x=3024
f(x)=(x-1)(x-2).(x-3)求导
(x+2)(x-3)(x-6)(x-1)=0
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
2x-(91-x)=1/3(91-x)-x