Open Middle®
Directions: Which is bigger?
The common ratio, r, in a geometric sequence with
OR
the common difference, d, in an arithmetic sequence with
Hint
How do you find the common ratio/common difference?
Can you tell just by looking at the given information? Why or why not?
Answer
r = 4 and d = 5, so the common difference in this case is bigger.
Source: Nanette Johnson
It is interesting to see the importance of subscript notation here. CCSS generally show function notation for sequences, and rightly so, because sequences are functions. However, I think it would be much messier to write this question without subscript notation.