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14 June, 02:49

Find the 100th term of the sequence - 7, 3, 13, 23, ...

-1097

1093

40

+3
Answers (1)
  1. 14 June, 03:10
    0
    First you need to determine which type of sequence is this. Because the difference between 2 successive numbers is constant and it is equal to 10 this sequence is geometric one.

    d = 10

    To calculate what is the value of some member of this sequence you use formula:

    An = Ao + (n-1) * d

    where n represents position of element An, Ao is value of first element in the sequence.

    Replacing values we get:

    A110 = - 7 + 109*10

    A110 = 1083.
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