-7X(-3)X(-0.5)+(-12)X(-2.6)

如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. (x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12) (x×x+3x+2)(x×x+7x+12)-24 解方程3x=x+4,2.6x-8=2.4x,4x+12=10x+3 ,7x=12-×,2.5x=2x+4,5x+3=6x 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 (（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 化简：9x-12x+5x,3x-5x-2+5x+8,3x+5+2x+3-7-11x (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 2x+3x+4x+5x+x+6x+7x=100