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20 June, 11:41

Determine whether the geometric series is convergent or divergent. 9 + 8 + 64/9 + 512/81 + ... If it is convergent, find its sum?

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  1. 20 June, 13:47
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    Convergent; 81

    Step-by-step explanation:

    r = term2/term1 = 8/9

    8/9 < 1 so convergent

    Sum = 9 / (1 - 8/9)

    = 9 / (1/9) = 81
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