2x*5x^3 3x^3*(-1/3x) 3x*(-2x^2) a*(x-y) x^2*(1-x-x^2) (a^2+2
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x^2-6x+5= A(x-2)(x-3)B(x-6)(x+1)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
计算:[(-5+x)(-x-5)]² (x+3)²-(x+2)(x-1) (3x-a)(3x+a)(
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
1+x+x^2+x^3+.+x^99+x^100
①3a(5a-2b) ②(x-3y) ×(-6x) ③化简x(x-1)+2x(x+1)-3x(2x-5)
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)