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01-04-2016
Mathematics

Answered

what is the sum of the last four terms of the series 7+9+11+...+21

Verified Answer :

summer71 summer71

01-04-2016

7 - 9 = 2
9 - 11 = 2
You should see that the series just increases by +2

therefore you can figure out what the last four terms are and then add them up one of the last terms given is 21

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