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4 August, 22:06

Find the 8th term of geometric sequence 2,-10,50 ...

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  1. 4 August, 22:17
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    - 156250

    Step-by-step explanation:

    Find the ratio of the geometric sequence.

    -10/2 = - 5

    50/-10 = - 5

    The common ratio is - 5.

    Apply the formula.

    an = ar^ (n-1)

    Where a is the first term and r is the ratio.

    a8 = 2 (-5) ^ (8-1)

    a8 = 2 (-5) ^7

    a8 = 2 (-71825)

    a8 = - 156250
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