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Problem Statement
A geometric sequence, starts 20, 60, ...
a. Write a recursive de nition for the sequence.
b. Write a closed form de nition for the sequence.
Solution
a. for b.
Problem Statement
Given the information about each sequence, write an expression representing the fteenth term.
a. An arithmetic sequence has rst term 4 and second term 16. b. A geometric sequence has rst term 4 and second term 16.
Solution
a. or 172
b. or 1,073,741,824
80
Teacher Guide
Algebra
