Question: r the following function, find (a) the critical numbers, (b) the open intervals where the function is increasing, and (c) the open intervals where it

r the following function, find (a) the critical numbers, (b) the open intervals where the function is increasing, and (c) the open intervals where it is decreasing. f(x) =x#+12x +36x2+6 * . . (a) Identify the critical numbers of the function. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The critical number(s) is/are (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) O B. There are no critical numbers
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