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precalc

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Determine whether the sequence is geometric or arithmetic. Then give the general formula for the nth term of the sequence.

6.1, 6.9, 7.7, 8.5, 9.3,...

I think it is Geometric, but i don't know how to find the formula

  • precalc - ,

    If it's geometric, the ratio of successive terms does not change:

    6.9/6.1 = 1.131
    7.7/6.9 = 1.116
    ...
    not geometric

    If it's arithmetic, the difference between terms does not change:

    6.9-6.1 = .8
    7.7-6.9 = .8
    8.5-7.7 = .8
    9.3-8.5 = .8
    looks like an A.S. to me.

  • precalc - ,

    Determine the 8th term of the following arithmetic sequence. -7, 2, 11, 20...

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