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5. For the following functions find: (i) The intervals where the function is increasing and decreasing (ii) The intervals where the function is concave up

5. For the following functions find: (i) The intervals where the function is increasing and decreasing (ii) The intervals where the function is concave up and concave down (iii) Sketch a graph a) f(x) = 23 - 15x2 b) f(x) = x2e-1

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