If f(x)=(x-[x])sin1/x, then x=0,f(x) is
A. Continuous
B. discontinuous
C. not determined
D. none
The function f(x)=sin2x/x for x≠0;f(0)=1 at x=0 is
A. continuous
B. discontinuous
C. not determined
D. none
The function f(x)=(1+x)5/x,f(0)=e5 at x=0 is
A. continuous
B. discontinuous
C. not determined
D. none