|x-3|<x-1
|x-3|<x-1
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
设f(x)=x㏑(1+x^2),x≥0.(x^2+2x-3)e^(-x),x<0,求∫f(x)dx
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解不等式:(x+1)(x-3)<x(2x+3)-(x²-1)
[x(x+1)+x平方(x-1)]+(-3x)
1+x+x^2+x^3+.+x^99+x^100
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(1)(x-1)(x-2)(x-3)<0
若x满足1-7x<3-5x,-3x>0 化简代数式|x|-|x+1|
x²-3x-18<0 (x-1)(x+2)=(x-2)(2x+1)