foreverinfinity foreverinfinity
  • 28-06-2018
  • Mathematics
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Find an explicit rule for the nth term of the sequence. 7, -7, 7, -7, ...

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sqdancefan
sqdancefan sqdancefan
  • 09-07-2018
The first term is 7. The common ratio is -7/7 = -1. The general formula for the nth term of a geometric sequence can be used:
  an = a1·r^(n-1)
  an = 7·(-1)^(n-1)
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