Question 10 of 17 - 1 1 8 View Policies Current Attempt in Progress Find all critical points and then use the first-derivative test to determine local maxima and minima. Check your answers by graphing. f(x) = 3x4 - 48 + 1 Enter the critical points in increasing order. If there is no local maximum or local minimum, enter NA. X = X= The local maximum is at x = The local minimum is at x = AToutbooks and Madia 10:26 PM 52OF