1/7X+(338-X)*1/3=78
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
2x²+7x+1=0 x(x-1)=3x+7
1/x-2=7x/(x-2) -3
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
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
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
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),
(3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1
x+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0