Suppose that f is an even, periodic function with period 2, and that f(x) =x for all x in the interval [0, 1]. then the value of f(3.14) is ________

Since f is periodic with period 2 and  fx=x∀x∈0,1, and f(x) is even, there is symmetry about y-axis. Therefore, graph of(x) is as shown.f3.14=4-3.14=0.86