若A=4X^2-6X+3,B=5X^2-3X+4,则9x^2-9x+7等于
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
a*b=2×a+b 计算x*2x*3x*4x*5x*6x*7x*8x*9x=3039 x=
若A=4X^2-6X+3,B=5X^2-3X+4,则9x^2-9x+7等于
若X^5-3x^4+7x^3-6x^2+2x+9=(x-a)(x-b)(x-c)(x-d)(x-e)则ab+ac+ad+
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
已知集合A={X|3X(x-5)小于等于(2x-9)(x-5),B={x|2x^2-x-6>0}求AnB
对任意整数a.b,规定a*b=2xa+b,如果x*2X*3x*4x*5x*6x*7x*8x*9x=3039,求整数x.
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
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),
a=3x³-2x³-x+5 b=-7x³-6x+9 c=5x²-6x+4 求解a
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)