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Find the sum of the first 21 terms of the sequence 5,9, 13, 17, 21, ...

Find the sum of the first 21 terms of the sequence 5,9, 13, 17, 21, ...
asked 228k views
2 votes
Find the sum of the first 21 terms of the sequence 5,9, 13, 17, 21, ...

asked
User Josey
by
8.6k points

1 Answer

1 vote
21(5+85)/2= 21•45= 945
answered
User Jack Wilsdon
by
7.2k points
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