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Quartic Conjectures

Consider the function .

1. Find the tangent line to at the point . Can you do this in multiple ways?

2. Find a quadratic function whose graph is tangent to the graph of at the point .

3. Find a cubic function whose graph is tangent to the graph of at .

4. If dividing by gives a remainder whose curve is tangent to at , what do you think I must divide by in order to find a curve that is tangent to at the points AND at ? Find such a polynomial and graph it below.