Question: a) Find the intervals of increase/decrease of the function. [2 marks] b) On which intervals is the graph of the function f(x) concave up,

a) Find the intervals of increase/decrease of the function. [2 marks] b) On which intervals is the graph of the function f(x) concave up, and on which intervals is the graph concave down? [2 marks] -2 2

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