Homework: 4.3 What Derivatives Tell Us Homework Find the intervals on which f is increasing and the intervals on which it is decreasing f(x) =3x In x+4 Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. A. The function is decreasing on the open interval(s) . The function is never increasing. (Simplify your answer. Use a comma to separate answers as needed. Type your answer in interval notation Type an exact answer.) O B. The function is decreasing on the open interval(s) |and increasing on the open interval(s) (Simplify your answers. Use a comma to separate answers as needed. Type your answers in interval notation. Type exact answers.) O C. The function is increasing on the open interval(s) | .The function is never decreasing. (Simplify your answer. Use a comma to separate answers as needed. Type your answer in interval notation. Type an exact answer.) O D. The function is never increasing or decreasing