Which of the following is not a polynomial function? 1 А B f(x) = -2x* - 3x + 8x2 + 7 f(x) - 2x + 5x - 7x +11 f(x)= *** -5x + 8 f(x) - 0.83x + 3x - 2x + 5x4 - 12 C Ꭰ .