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21 July, 13:59

If the nth partial sum of a sequence an is given by sum_{k=1}^{n} 2k+4 then what is the 4th term of the sequence? A. 12 B. 14 C. 6 + 8 + 10 + 12 D. 4

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  1. 21 July, 15:44
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    2 (1) + 4=6

    2 (2) + 4=8

    2 (3) + 4=10

    2 (4) + 4=12

    fourth term would be 12 or A
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