A function f is known to have the following properties for all t: f(t+4)=f(t) and f(2+t)=f(2-t). Which of the following must be true?
A) f is periodic with period 4
B) f(t)>0 for all t
C) f(0)=0
D) f is an even function
E) f is an odd function
A function f is known to have the following properties for all t: f(t+4)=f(t) and f(2+t)=f(2-t). Which of the following must be true?
A) f is periodic with period 4
B) f(t)>0 for all t
C) f(0)=0
D) f is an even function
E) f is an odd function