Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a4 when a1 = 1600, r = - 
.
A. -100
B. -20
C. 200
D. -200
Answer: D
Mathematics
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A. 3 B. 5 C. 6 D. 4
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A. 
B. 
C. 
D. 
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Construct:
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