Use the formula for the sum of the first n terms of a geometric sequence.Find the sum of the first 13 terms of the geometric sequence: -4, -12, -36, -108, -324, . . .
A. -3,188,644
B. -3,188,607
C. -3,188,664
D. -3,188,642
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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