julissa1333 julissa1333

12-09-2020
Mathematics

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show that the sequence with sum of the first n term sn=3n²+5n is an arithmetic sequence.

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20100020130311 20100020130311

12-09-2020

Answer:

The formula says that the sum of the first n terms of our arithmetic sequence is equal to n divided by 2 times the sum of twice the beginning term, a, and the product of d, the common difference, and n minus 1. The n stands for the number of terms we are adding together.

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