√2/2x(-3√10/10)-√6/2x√10/10+√3/2x√5/5-1/2x2√5/5化简
求解sin(x)+lim(x→-∞)+2/x*[x,(x+2)*3]/x+x6+x2/(x+[x,x2+2x])+√x
若-3≤x≤2时,试化简|x-2|+√(x+3)2+√x2-10x+25
因式分解:6(x+y)2-11(x+y)-10 (x2+5x+3)(x2+5x-2)-6
式子√x2+2x+工,√-x2-4x-5,√18,√-1-x2中,有意义的
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
化简求值x/x-1-x+3/x2-1 x x2+2x+1/x+3,其中x=√2+1
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(3x+2)(3x-2)-5x(x-1)-(2x-1)²,其中√5<x<√10,且x为整数.
先化简再求值[[(x2+2x+1)/(x+2)]÷[(x2-1)/(x-1)]-x/(x+2)其中x=√3-2
x^4+√5x^3-11x^2-√5x+10因式分解
100分x^3(2x-5)(x+1)+(5x+2)(x-1)=0x^2/3+48/x^2=10(x/3-4/x)√x-1