Find the critical numbers, the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. Do not graph. f(x) = 2x + 72 X Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The critical number(s) is(are) (Type integers or simplified fractions. Use a comma to separate answers as needed.) OB. The function has no critical numbers.

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A: Topic:- calculus