当X等于7/8时,求(X-5)(X-5)+(X+2)(X-2)-2(X+3)(X-4)+1
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
求当x=1时,代数式x(x+3)分之1+(x+1)(x+4)分之1+(x+2)(x+5)分之1+...+(x+7)(x+
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
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x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
当x=5时,(x²-x)-(x²-2x+1)等于
当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5
1+2x+3x^2+4x^3+5x^4+6x^5+7x^6+8x^7+9x^8+10x^9+11x^10当x=-1时的值
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4