Consider the following. y = 4x-3x+9 (a) Find the critical values of the function. (Enter your...

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Consider the following. y = 4x-3x+9 (a) Find the critical values of the function. (Enter your answers as a comma-separated list.) X = (b) Make a sign diagram and determine the relative maxima and minima. (If an answer does not exist, enter DNE.) relative maxima (x, y) = relative minima (x, y) = (x-1)=( Consider the following. y = 4x-3x+9 (a) Find the critical values of the function. (Enter your answers as a comma-separated list.) X = (b) Make a sign diagram and determine the relative maxima and minima. (If an answer does not exist, enter DNE.) relative maxima (x, y) = relative minima (x, y) = (x-1)=(