Show how the following sequences is an arithmetic or not me

not arithmetic

Step-by-step explanation:

An arithmetic sequence has a common difference d between consecutive terms.

Given

= 2n² - 1

Substitute in n = 1, 2, 3, 4 to generate the first 4 terms of the sequence

= 2(1)² - 1 = 2 - 1 = 1

= 2(2)² - 1 = 8 - 1 = 7

= 2(3)² - 1 = 18 - 1 = 17

= 2(4)² - 1 = 32 - 1 = 31

check the difference between consecutive terms

7 - 1 = 6

17 - 7 = 10

31 - 17 = 14

The differences are not common hence not an arithmetic sequence

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step-by-step explanation:

the answer is 21%.