the 8th term of an arithmetic sequence is 12 and it's 12th term is 8. What is the algebraic expression for this sequence?
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Step-by-step explanation:
T8=12 and t12=8 hence
a+7d=12, and a+11d=8 hence 4d=-4 hence d=-1, a=12+7=19 hence the series will be
19,18,17,16……12,…8
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