Write the first four terms of the sequence.an = (-3)n+1
A. a1 = -3, a2 = 9, a3 = -27, a4 = 81
B. a1 = -9, a2 = 27, a3 = -81, a4 = 243
C. a1 = 3, a2 = -9, a3 = 27, a4 = -81
D. a1 = 9, a2 = -27, a3 = 81, a4 = -243
Answer: D
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