百度作业网x-1/x=-3 x^2+1/x^2=( ) (x+1/x)^2=( )
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/x平方-x+2=2x/x+1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
f(x-1)=x^2-2x+3(x
(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
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1