Write the first four terms of the geometric sequence with the given first term, a1, and common ratio, r.a1 = -3, r = -7
A. -3, 21, -63, 189, . . .
B. -3, 21, -147, 1029, . . .
C. -3, 21, 63, 189, . . .
D. -3, 21, 147, 1029, . . .
Answer: B
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A. 
B. 
C. 
D. 
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