Difference between revisions of "1990 AHSME Problems/Problem 12"
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== Solution == | == Solution == | ||
− | If <math>f( | + | If <math>f(x)=-\sqrt2</math>, then <math>ax^2=0\implies x=0</math>. Therefore <math>f(\sqrt2)=0\implies 2a=\sqrt2</math>, so <math>\fbox{D}</math> |
== See also == | == See also == |
Latest revision as of 14:47, 3 September 2024
Problem
Let be the function defined by for some positive . If then
Solution
If , then . Therefore , so
See also
1990 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 11 |
Followed by Problem 13 | |
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All AHSME Problems and Solutions |
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