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15 January, 15:49

Write the explicit formula for this geometric sequence: 8, - 8, 8, - 8, ...

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  1. 15 January, 17:20
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    A2=a1 * (-1) = 8 * (-1) = - 8

    a3 = (-8) * (-1) = 8

    ...

    a (n) = a (n-1) * (-1)
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