Which tank is better IS or TIGER 1

Did the both the us and ussr have atomic weapons after 1949

When can a bill be sent to the president for approval?

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: (