Which function is NOT continuous at x=0x=0x=0?
f(x)=x+1f(x) = x+1f(x)=x+1
f(x)=1/xf(x) = 1/xf(x)=1/x
f(x)=exf(x) = e^xf(x)=ex
f(x)=sin(x)f(x) = \sin(x)f(x)=sin(x)