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In Each Sequence Defined, Find a5a_{5}
(A) an Arithmetic Sequence With

Question 4

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In each sequence defined, find a5a_{5} .
(a) An arithmetic sequence with a1=9a_{1}=9 and a3=−11a_{3}=-11 .
(b) A geometric sequence with a1=−4a_{1}=-4 and r=13r=\frac{1}{3} .

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