Even function

The function f(x) is an even function defined on the interval [ -3, 3 ].

Give that f(x) = 1, x [ 0 , 1 ] and f(x) = 2x -1 dla x ( 1 , 3 ].

a) sketch the graph of f(x) for x [ -3, 3 ].

b) find the value of x for which f(x) = 2