若a≥x≥3,化简|x-7|+|5-x|

若a≥x≥3,化简|x-7|+|5-x| 若多项式2x*x*x*x-3x*x*x+ax*x+7x+b能被x*x+x-2整除,求a:b *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 已知5(3-2x)≥16-7x,化简|-x-3|-4|2x+5| (1) 化简：2/(x+1)(x+3)+2/(x+3)(x+5)+2/(x+5)(x+7)+...+2/(x+2009)(x+2011)(2) 若对于一切不为0且不为-2的实数x,(5x+4)/x(x+2)=A/x+B(x+2),求常数A,B的值 3(2x+1)≥2(4x+1)+7,化简|-x-2|-|5x+4| 解关于x的不等式3x-5a/x-1≥2x-3a/x-1 解关于x的不等式3x-5a/x-1≥2x-3a/x-1 若集合P={x|3-x≥根号x-1}与M={|x-a| 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 （1）方法 1.-X^2+X≥3x+12.x（x+9)≤3（x-3）3.X^2-2x＜2X^2+2解题格式一定要写好哦4.-x+1/2x+5≥05.（m-2)x＞1-m6.X^2-（a-3）X-3a＜07.X^2-(a+1/a）x+1＞0 若 5≥x≥3 化简|x-7|＋|5-x| 若A=大括号x|(1-x)/(x-3)≥0,函数f(x)=4^x-3.2^(x+1)+5 其中x∈A,1求函数f(x)的定义域2求函数的值域 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!)+. 若x的绝对值 >x, 则( ) A. x≥0 B. x>0 C. x matlab中a(x)=x^4+3x^3+9x-18 b(x)=x^5-4x^3-18x+7 c(x)=x^7+6x^5+9x^3-5x^2-2 d(x)=x^9-8x^7+6x^5-4x^4+d(x)=x^9-8x^7+6x^5-4x^4+6x^2+3 求e(x)=a(x)*b(x)*c(x)*d(x) 化简-7x-{3x-2[x-a(x-1)]-3(2x-2)}