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aksik [14]
3 years ago
13

Write a formula for this sequence: 8,-1,-10,-19

Mathematics
1 answer:
Romashka [77]3 years ago
4 0
This is an arith. sequence, and the common difference is -9.

a(n+1) = a(n)-9, with a(1)=8.  Thus, if we look at the first term, we see 8; subracting 9 from 8 produces the second term (-1).
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