3^2+(x-1)^2=x^2 9+x2-2*x+1=x^2 2x=10 x=5
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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+2)(x2-2x+4)+(x-1)(x2+x+1),其中x=-三分之二
x · 根号(X2+3X+18) - X · 根号(X2-6X+18)=1 那么2X · 根号(X2-6X+18)-9X
函数f(x)=(x2+2x-3)/(x-1) (x>1) ax+1 (x
x(2x-1)2-4(x-3)(x2+3x+9)-(9+2x)(9-2x)=0
化简求值:[3x/(x-1)-2x/(x+1)*(x2-1)/x 其中x=根号5 -5
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)