In what way was the first crusade, launched in 1095 ce, similar to the third crusade, launched nearly a century later? a. both ended with a negotiated treaty. b. both had the objective of conquering jerusalem. c. both expanded the territory of christianity. d. both resulted in christian control of the holy land.

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: (