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5 June, 17:31

Write an equation for the nth term of the given geometric sequence

-12,-36,-108 ... an

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  1. 5 June, 20:31
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    nth term of the geometric sequence

    an = - 12*3^ (n-1)

    Step-by-step explanation:

    First term

    a = - 12

    Second term

    ar = - 36

    -12r=-36

    r=-36/-12

    =3

    Third term

    ar^2 = - 108

    -12 (3) ^2

    = - 12 (9)

    = - 108

    nth term of the geometric sequence

    an=ar^ (n-1)

    = - 12*3^ (n-1)
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