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  • Perplex
    IB Math AASL
    /
    Sequences & Series
    /

    Problem Bank

    [Maximum mark: 8]

    The first, fourth and tenth terms of an arithmetic sequence are consecutive terms of a geometric sequence with ​r=1.

    1. Find the common ratio ​r.

      [5]
    2. Given that the sum of the first ​4​ terms of the geometric sequence is ​45, find the first term in the sequence.

      [3]

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