Determine all maximum and minimum turning points of the function: y= 3x* + &r' -90 Find also, the points of inflexion, if any, and verify by testing for a sign change in the second derivative. (It is not required to plot the graph of the function)

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A: Step 1:Step 2:Step 3: Step 4:

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Q: can you solve it without any derivative. Just simplying and then plugging it in. Thanks

A: We gave complete explainaton in below.

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Q: Use the definition of the derivative (AKA the four step process) to find the derivative of f(x) =…

A: NOTE: Refresh your page if you can't see any equations. . substitute x+h for x