Question

Which of the following is an arithmetic sequence?

Answer 1

In order to find the answer, we have to find common difference for each.

Option 1.

first difference= 3-(-1) =4

second difference = -3-3=-6

here we dont have a fixed common difference, so its not an arithmetic series.

Option 2.

first difference= -2-2=-4

second difference = -6-(-2) = -4

third difference = -10-(-6) =-4

here we have a fixed common difference, so its an arithmetic series.

Option second is the correct answer

Answer 2

In order to find the answer, we have to find common difference for each.

Option 1.

first difference= 3-(-1) =4

second difference = -3-3=-6

here we dont have a fixed common difference, so its not an arithmetic series.

Option 2.

first difference= -2-2=-4

second difference = -6-(-2) = -4

third difference = -10-(-6) =-4

here we have a fixed common difference, so its an arithmetic series.

Option second is the correct answer