2008 Mock ARML 1 Problems/Problem 5
From AoPSWiki
Problem
The positive real numbers 
are in arithmetic progression in that order. They also satisfy
Compute the common difference of this arithmetic progression.
Solution
Let 
be the common difference of the progression. Then, by difference of squares,
See also
| 2008 Mock ARML 1 (Problems, Source) | ||
| Preceded by Problem 4 | Followed by Problem 6 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 | ||
