Given that the image of the function f (x) is symmetric with respect to the y-axis, and the interval is in (- ∞, 0), if x = - 1, f (x) has a minimum value of 3, then in the interval (0, + ∞), if x=__ When, F (x) has the most__ The value is__

Given that the image of the function f (x) is symmetric with respect to the y-axis, and the interval is in (- ∞, 0), if x = - 1, f (x) has a minimum value of 3, then in the interval (0, + ∞), if x=__ When, F (x) has the most__ The value is__

When x=_ 1_ F (x) has a minimum value of 3