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OpenStudy (anonymous):
What is the 19th term of the arithmetic sequence 15, 23, 31, … ? 143 151 159 166
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OpenStudy (anonymous):
We can see that 23-15=8. 31-23=8. So the step is 8. Then the 19th term would be 18 steps away from the 1st. That is 15+18*8
OpenStudy (loser66):
take a look at http://www.regentsprep.org/Regents/math/algtrig/ATP2/ArithSeq.htm formula there
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