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Thread: Sequences and Series questions

  1. #1
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    Sequences and Series questions

    1. Find the sums of these AP's who's terms are logarithms

    a) log (b) 36 + log (b) 18 + log (b) 9 + ...log (b) 9/8


    b) log (x) 27/8 + log (x) 9/4 + log (x) 3/2 + ....(10 terms)

  2. #2
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    Re: Sequences and Series questions

    For a), note that the term inside the logarithm is halved each time.

    So, rewrite it as



    And use the law .

    b) can be solved similarly.

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    Re: Sequences and Series questions

    Thats actually a good question (at least for me)

    It took me long to realise the ratio and AP being together, fan96 gets the credit
    Last edited by HeroWise; 14 May 2018 at 9:33 PM.

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