Write the first four terms of the sequence.an = (-1)n(n + 9)
A. a1 = -10, a2 = 11, a3 = -12, a4 = 13
B. a1 = -10, a2 = -22, a3 = -36, a4 = -52
C. a1 = 10, a2 = 11, a3 = 12, a4 = 13
D. a1 = -10, a2 = -11, a3 = -12, a4 = -13
Answer: A
Mathematics
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