bluejoneYukie
bluejoneYukie
21-09-2016
Mathematics
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50th term of 7,5,3,1
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nobillionaireNobley
nobillionaireNobley
23-09-2016
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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