Solving a problem using #Divide And #Conquer? When Is bad to use it?

This video uses a recursive #divide-and-conquer approach for solving the #Fibonacci sequence to show when divide and conquer is not a good solution. Some related videos: 1) Why does it take so long to find the #Fibonacci of number n? https://www.youtube.com/watch?v=HPinzDiFRa8 2) #Fibonacci Sequence. Demo Recursive and Iterative methods and time complexity analysis https://www.youtube.com/watch?v=I7G7PeqN6uU 3) Computational Complexity's Playlist https://www.youtube.com/playlist?list=PLMX4znd6E6nsQET9iW-RvxFsWgb5hUuV_