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13 April, 10:30

Find the 77th term of the arithmetic sequence 14,3,-8, ...

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  1. 13 April, 12:23
    0
    -822

    Step-by-step explanation:

    Let's make an equation (explicit of course)

    3 - 14 = - 11

    d = - 11

    Now we are ready to make an equation!

    f (n) = x first term + d (n-1)

    =

    f (n) = 14 - 11 (n-1)

    Let's substitute 77 for n!

    f (77) = 14 - 11 (77-1)

    f (77) = 14 - 11 (76)

    =

    14 - 836 = - 822
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