Question: Let f(x) = x4 + 6x^2 2. a) Find all critical points; b) Find the interval(s) where f(x) is increasing. c) Find all points of

Let f(x) = x4 + 6x^2 2.

a) Find all critical points;

b) Find the interval(s) where f(x) is increasing.

c) Find all points of inection;

d) Find the interval(s) where f(x) is concave down.

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