Which of the following factors led Greek communities to build both an army and a navy? their location on a peninsula their access to many rivers their access to mountains their location near the Middle East

You are given the first four terms of an arithmetic sequence. why might you use a recursive formula? why might you use an explicit formula? under what conditions might a recursive formula be preferred over the explicit formula? under what conditions might an explicit formula be preferred over the recursive formula? pleasss ! sorry if it's a long question: (