Difference between revisions of "2021 Fall AMC 10B Problems/Problem 3"
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Revision as of 20:05, 22 November 2021
Problem
The expression is equal to the fraction in which and are positive integers whose greatest common divisor is . What is
Solution
We write the given expression as a single fraction: by cross multiplication. Then by factoring the numerator, we get The question is asking for the numerator, so our answer is giving answer choice