3x-7>-2x+3 4x-12>0
(x-2)(x-3)/(x+5)(x-7)>0
几道解不等式|x+1|>x|x-1|+|x-2|=7(X^2-2x+1)(x+1)^3(2-x)/[(X+4)(X^2-
1.(x³-4x²+4x)(3+2x-x²)>0
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1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1.3-2x>-3 2x-3>-7 2.2x+5>5x+2 x-1>3x 3.7x-9≥4x-3 6x+7<11x+12
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
化简:[√(x^2-6x+9)/x^2-x-12]*(x^3-16x)/(x^2-3x)-1/(x+3) {x>3}
3x-7>-2x+3 4x-12>0