The sequence is defined recursively. Write the first four terms.a1 = 5; an = 3an-1
A. a1 = 5, a1 = 17, a2 = 47, a4 = 137
B. a1 = 12, a1 = 36, a2 = 108, a4 = 216
C. a1 = 5, a2 = 15, a3 = 45, a4 = 135
D. a1 = 5, a1 = 14, a2 = 13, a4 = 12
Answer: C
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