设F(X)=X-1(X≤0);X+1(X大于0),作出这个图像,并判断当X-无穷大时,F(X)有无极限

设f(x)=1/x(x 设f(x)=1-x,(x 设函数f(x)=x-[x],x≥0,f(x+1),x 设f(x)={3x-1,x=0,求f(-x),f(x-2). 设f(x-1)={-sinx/x,x>0;2,x=0;x-1,x 设f(x-1)={-sinx/x,x>0;2,x=0;x-1,x 设f（x）={x^sin(1/x),x>0 a+e^x,x 设f(x)=x(x-1)(x-2)...(x-999),则f'(0)=? 设f(x)=x(x-1)(x-2).(x-1000) 则f'(0)=?RT 设f(x)=x(x+1)(x+2).(x+100),则f '(0)= 设f(x)=(x平方-1)/(x-1) (x 设f(x)=(x平方-1)/(x-1) (x 设f(x)=x/2+1/x(x 设函数f(x)={a/x+b/(x²-x) x>1{x x 设f(x)={|x-1|-1(x>0) {x2-2x-3(x≤0),解不等设f(x)={|x-1|-1(x>0){x2-2x-3(x≤0),解不等式f(x)≥0 设f(x)满足f(1/x)=x/1-x设设f(x)满足f(1/x)=x/1-x ,则f(x+1)=? 设f(x){e^(1/x),x 分段函数求极限设函数f(x)=｛x ,x≥0 x ,x设函数f(x)=｛x ,x≥0 1 ,x