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sketch the function and identify all stationary points

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1. Draw a sign graph to determine where the following function is increasing or decreasing. Identify all stationary points.

y=2x^4-4x^2+1

2. Find the intervals where the following curve is concave up or down. Also find the coordinates of any points of inflection.

y=2x^3 - x^2 +3x+5
3

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The solution shows how to sketch the function and determine where the following function is increasing or decreasing. Identify all stationary points.

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