S-x3 + 2, y = l-x² + 4x, xS0 x > 0 Find the critical numbers. (Hint: Check for discontinuities.) (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) X = Find the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation. If an answer does not exist, enter DNE increasing decreasing Sketch the graph of the function to verify your results.

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