(9-10)x (10-11)x(11-12)x.x(108-109)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程:x(x-1)/1+x(x+1)/1…+(x+9)(x+10)/1=11?12
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
因式分解3x*x+11x+10
计算:(x^2+6x+10)/(x^2+6x+9)+(x^2-11)/(x^2-9)+(2x^2+8x+5)/(x^2+
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解方程:(x+8)/(x+7)+(x+10)/(x+9)=(x+7)/(x+6)+(x+11)/(x+10
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+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x(x-1)分之一+x(x+1)分之一+········+(x+9)(x+10)分之一=12分之11 怎么算?
X+2/3X=X+10+9/11X+10=?
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x