What factors was key to the formation of the first civilization in the Nile Valley?

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: (

How does smith characterize the colonizing effort and why does he so characterize the effort to settle jamestown?

What effect did the practice of iconoclasm have on the byzantine empire