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N76 [4]
3 years ago
5

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

Mathematics
1 answer:
Doss [256]3 years ago
7 0
<span>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</span>
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See attachment for the diagram that has been drawn with the necessary information needed for John to prove that ∆ABC is congruent to ∆DEF.

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