algebra 2

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what is the 6th term of the geometric sequence 2000, 800, 320,..../

  • algebra 2 -

    Start by taking the ratio of 800/2000
    reduce it to 2/5 or .4

    multiply 800 times .4 = 320

    next multiply 320 times .4
    and continue until you get to the 6th term.

  • algebra 2 -

    you could do that, or just use the formula for the
    nth term of a GS, which is ar^(n-1)

    6th term = 2000(.4)^5 = 20.48

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