What is an excise tax?

a. a tax placed on imported goods

b. a tax placed on goods transferred within a country

c. a tax placed on agrarian goods

d. a tax placed on industrialized goods

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: (