大师作文网[12÷(x-6)x(3+1/3)-9]+1900=1981
![[12÷(x-6)x(3+1/3)-9]+1900=1981](/uploads/image/z/7166383-7-3.jpg?t=%5B12%C3%B7%28x-6%29x%283%2B1%2F3%29-9%5D%2B1900%3D1981)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
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^21+x^15+x^12+x^9+x^6+x^3+1)/(x^2+x+1)
（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
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
先化简,再求值:1/x+1-3-x/x²-6x+9÷x²+x/x-3,其中x=根号2.
计算:(1/X^2+3X+2)+(1/X^2+5X+6)+(1/X^2+7X+12)=(1/X^2+9X+20)
x^2-x/x+1÷x/x+1 ；x^2+6x+9/x^2-9÷x+2/x-3；2/a÷4/a