2018 AMC 12B Problems/Problem 9
Contents
[hide]Problem
What is
Solution 1
We can start by writing out the first couple of terms:
Looking at the second terms in the parentheses, we can see that occurs
times. It goes horizontally and exists
times vertically.
Looking at the first terms in the parentheses, we can see that
occurs
times. It goes vertically and exists
times horizontally.
Thus, we have:
This gives us:
Solution 2
(Vfire)
Solution 3
See Also
2018 AMC 12B (Problems • Answer Key • Resources) | |
Preceded by Problem 8 |
Followed by Problem 10 |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
All AMC 12 Problems and Solutions |
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