若 5≥x≥3 化简|x-7|+|5-x|
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!)+.
3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
|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?
若x*x+x+1+0,求x^7+2x^6+x^5+x^4+x^3+x*x+1的值
若X满足不等式组2X+4>3X-1 五分之X-2≥0,化简2|X-2|-|X-5|
(1)3x/(x+2)>x+6;(2)x+1+5x^2/(x+2)≥1/(1-x);
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
2x+3x+4x+5x+x+6x+7x=100
已知:1-(x-3/2)≥3+x/3,化简|x-1|-|x+4|+5
|x+5|+|x-7|+|x+10|化简