1. 2(x+1)^2=18 2. 9(x-2)^2=(2x+1)^2 3. x(x-2)=3
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1.x/9+x=62.x/x+1 + x+1/2x = 3
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x/x平方-x+2=2x/x+1
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
1.f(x)=1-x² 2.f(x)=-3x+1 3.f(x)=2/x 4.f(x)=(x-x²)/
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),
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
2x/x^2-9=x-1/x^2-6x+9-1/x+3