consider the arithmetic sequence 5, 9, 13. what is its 7th term. what is the sum of 1st 13 terms
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Answer:
Step-by-step explanation:
5, 9, 13.
a=5,d=9-5=4
So S13=13/2(2*5+12*4)
=13/2(10+48)
=58*13/2
=377
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