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Deutro · Answer 1 · 2017-10-24T01:23:16+0000

This is an arithmetic sequence, where the first term (a) is 15 and the common difference (d) is -2.
The general formula for the nth term of an arithmetic sequence is:

$n_(th\ term) =a+(n-1)d$
Therefore the required equation is:

$10_(th) \ term=15+(10-1)*-2$

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