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In the function f(x) = 5x4-2x2-27 find the following: a) their critical values b)local maximum and...

In the function f(x) = 5x4-2x2-27 find the following:

a) their critical values

b)local maximum and minimum points

c)The intervals where the concavity is up and down

d) draw the graph and mark on it all the important points; maximum, minimum and inflection points

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