What rule can be used to find the next term of the arithmetic sequence? 39, 60, 81, 102, 123, . . A.an = an–1 – 39 B.an = an–1 – 21 C.an = an–1 + 21 D.an = an–1 + 39

QUESTION POSTED AT 01/06/2020 - 04:22 PM

Answered by admin AT 01/06/2020 - 04:22 PM

an = an–1 + 21               the answer is c
                          
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