2010 AMC 12A Problems/Problem 4
Problem
If , then which of the following must be positive?
Solution
is negative, so we can just place a negative value into each expression and find the one that is positive. Suppose we use .
Obviously only is positive.
See also
2010 AMC 12A (Problems • Answer Key • Resources) | |
Preceded by Problem 3 |
Followed by Problem 5 |
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All AMC 12 Problems and Solutions |