Find an explicit formula for the nth term of the following sequence. Assume n ≥ 1.?

1, -1/3, 1/9, -1/27, ...

5 Answers

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  • alex
    Lv 7
    4 years ago

    (-1/3)^n with n=0 , 1, ...

  • Ian H
    Lv 7
    4 years ago

    nth term is (-3)^(1 - n) for n = {1, 2, 3, 4, ....}

  • 4 years ago

    (-1/3)^(n-1)

  • syl
    Lv 6
    4 years ago

    1/81, -1/243, 1/729,...........

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  • Mike G
    Lv 7
    4 years ago

    a_n = (-1/3)^(n-1)

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