设f(x)后写个大括号 x^2(x|>=1),x (|x|=1),x (|x|

设f(x)=1-x,(x 设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 设f(x-1)={-sinx/x,x>0;2,x=0;x-1,x 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), 设f(x)=x(x+1)(x+2).(x+100),则f '(0)= 设函数f(x)=x-[x],x≥0,f(x+1),x 设函数f(x)=2x-1 (x 设函数f(x)={(x-2)2,x>1：x,-1≤x≥1：x+1,x 设函数f(x)={x^2+1(x>=0) ,-2x(x 设f (x)={2x+1(x≥0),x²+4(x 设函数f(x)=log2(-x),g(x)=x+1,F(x)={g(x),f(x)大于等于g(x);f(x),f(x)小 设函数f(x)=大括号x+1(x0),则不等式f(x)>=2x^2的解集是