x+{x/5}+{x/5}3得180

x+{x/5}+{x/5}3得180 3x-5/2x+1>=-5我得x>=0或x 解方程1/(x+x﹚+1/(x+3x+2﹚+1/(x+5x+6﹚+1/(x+7x+12﹚=4/21得 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!)+. 5x^2+2x-3因式分解得 x-12=34+3x移项得 7x-3=6x-5移项得 3x³-4x²+5x-1/x²+3x-1得,要得数! x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x x/x-3-5x/x^2-x-6计算 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 根号3（x－10）＝x 解得x＝ 15+5根号3