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Solve the Problem $a _ { 3 } = \frac { 8 } { 9 } \text { and } a _ { 5 } = \frac { 8 } { 81 };$

Question 198

Essay

Solve the problem.
-In a geometric series, $a _ { 3 } = \frac { 8 } { 9 } \text { and } a _ { 5 } = \frac { 8 } { 81 };$ ; find r and find r anda1.

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