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Mathematics
Cinder
30 May, 13:46
Write a formula for this sequence: 8,-1,-10,-19
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Alessandro Michael
30 May, 15:20
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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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