Question

Is the following sequence arithmetic? 11, 15, 19, 23,...
A. yes
B. no

Answer 1

Yes it is. It has a common difference that is 4. Another way to describe this is that you are adding 4 each time to get the next term in the sequence, no other value.

Answer 2

\(\Large \color{purple}{\rightarrow a_{n} = 11 + 4(n - 1) }\)

Answer 3

Or, \(\Large \color{purple}{\rightarrow a_{n} = 7 + 4n }\)

Answer 4

Thanks