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24 September, 11:41

Find n for the sequence for which an = 37, a1 = - 13 and d = 5.

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  1. 24 September, 13:15
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    The equation for a sequence is

    an=a1 + (n-1) d

    Replace the variable with what you were given you get

    37=-13 + (n-1) 5

    Simplify

    37=-13+5n-5

    Combine like terms

    37=5n-18

    Reverse operations

    55=5n

    Simplify

    n=11
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