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Thread: Geometric Sequence

  1. October 23rd 2008, 12:17 PM #1
    magentarita
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    Geometric Sequence

    Find x so that x - 1, x, and x + 2 are consecutive terms of a geometric sequence.

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  2. October 23rd 2008, 12:23 PM #2
    masters
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    Quote Originally Posted by magentarita View Post
    Find x so that x - 1, x, and x + 2 are consecutive terms of a geometric sequence.
    In a geometric sequence, there must be a 'common ratio' between consecutive terms. So...

    \frac{x}{x-1}=\frac{x+2}{x}

    Solve for x.
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  3. October 23rd 2008, 05:42 PM #3
    magentarita
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    again....

    Quote Originally Posted by masters View Post
    In a geometric sequence, there must be a 'common ratio' between consecutive terms. So...

    \frac{x}{x-1}=\frac{x+2}{x}

    Solve for x.
    I had no idea that there must be a common ratio in terms of geometric sequence.
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« Find x | Arithmetic Sequence »

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