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OpenStudy (anonymous):
What is the 43rd term of an arithmetic sequence with a rate of increase of -6 and a11 = 12?
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OpenStudy (anonymous):
Let a be the first term. \[a _{n}=a+\left( n-1 \right)d\] n=11 d=-6 \[a _{11}=12\] find a ,then \[find~ a _{43}~by~formula.\]
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