This function f (x) has a domain of x = {-a, - b, a, b}. In order, the x values are - a, - b, b, a. In order, the f (x) values are 3c + 1, 2d - 5, 4d + 3, 6 - 2c. Which values of c and d make this an even function? a. c = - 7 and d = 1/3 b.
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