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27 March, 05:22

What is the sum of the series?

5

∑ 2j

j=1

+4
Answers (1)
  1. 27 March, 08:40
    0
    Substituting for values of j:-

    S5 = 2 (1) + 2 (2) + 2 (3) + 2 (4) + 2 (5) = 2+4+6+8+10 = 30 answer
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