Which was not an accomplishment of galileo galilei?

a. producing a precise astronomical calendar

b. creating a powerful telescope

c. confirming that the earth revolves around the sun

d. discovering moons orbiting jupiter

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: (