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23 April, 18:50

What is the 43rd term of an arithmetic sequence with a rate of increase of - 6 and a11 = 12?-174-176-180-186-240

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  1. 23 April, 22:23
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    Hello:

    an = a1 + (n-1) d ... d = - 6 and a11 = 12

    terme general : an = ap + (n-p) d

    n = 43 and p = 11 a41 = a11 + (43-11) (-6)

    a41 = 12 - 192 = 180
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