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13 June, 03:08

Determine 8th term in the geometric sequence whose first term is - 10 and whose common ratio is 2

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  1. 13 June, 03:15
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    Any geometric sequence can be expressed as:

    a (n) = ar^ (n-1), a=initial term, r=common ratio, n=term number

    We are told that a=-10 and r=2 so:

    a (8) = - 10 (2^7)

    a (8) = - 1280
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