Diberikan nilai a = -1, b = 3, c = 2, m = 1/2 , dan n =

Diberikan nilai a = -1, b = 3, c = 2, m = 1/2 , dan n = -2/3 . Tunjukkan bahwa: a. ((a - 1)(b - 1)(c - 1))/(m - 1)(n - 1)) = -4 4/5 b. ((a - b)^2 + 2c)/(ma + bn) = -8