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6 September, 07:55

What is the fifth term of a sequence whose first term is 5 and whose common ratio is 3?

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  1. 6 September, 08:13
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    An=a1 (r) ^ (n-1)

    a1=first term

    r=common ratio

    given

    a1=5

    r=3

    an=5 (3) ^ (n-1)

    5th term, n=5

    a5=5 (3) ^ (5-1)

    a5=5 (3) ^4

    a5=5 (81)

    a5=405

    405 is theh 5th term
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