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10 July, 21:18

50th term of 7,5,3,1

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  1. 10 July, 21:48
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    7, 5, 3, 1 is an arithmetic sequence with common difference (d) = - 2 and first term (a) = 7.

    Tn = a + (n - 1) d

    T50 = 7 + (50 - 1) x - 2 = 7 + 49 x - 2 = 7 - 98 = - 91

    50th term = - 91
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