Write a formula for the general term (the nth term) of the sequence. Then use the formula for an to find the twelfth term of the sequence.9, 3, 1, , . . .

A. an = 9n + 1; a12 = 
B. an = 3n - 1; a12 = 
C. an = 9n; a12 = 
D. an = 9n - 1; a12 = 

Answer: D

Mathematics

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