Question

1. Which of these is an infinite arithmetic sequence?

O {691, 632, 573, 514}
O {232, 354, 476, 598, ...}
O {845, 169, 33.8, 6.76, ...}
O {724, -362, 181, -90.5}

Answer 1

Answer: Choice B

Each time we're adding 122 to each term to get the next term

• 232+122 = 354
• 354+122 = 476
• 476+122 = 598

This goes on forever because of the three dots, hence the set is infinitely large.

We say that the common difference is 122. Subtracting any two adjacent terms gets us this value. Eg: 354-232 = 122.