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galina1969 [7]
3 years ago
7

What is the 20th term of the sequence that begins -3, 6, -12, 24...

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
6 0

This is a geometric sequence with first term -3 and common ratio -2, or a_n=-3(-2)^{n-1}. Thus, a_{20}=-3(-2)^{19}=\boxed{1572864}.

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