A geometric sequence has an initial value of 3 and a common ratio of 2. Which function(s) or formula(s) could represent this situation? Select all that apply. A. f(n) = 3(2)n − 1
B. f(n) = 2(3)n − 1
C. an = 2(an − 1); a1 = 3
D. an = 3(an − 1); a1 = 2
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