Let f:

be a real-valued function defined on the set of real numbers that satisfies:

≤

for all real numbers and . Prove that for all ≤ .

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- September 6th 2011, 04:11 AMstrawberrysundaeFunctional Inequality Proof
Let f:

be a real-valued function defined on the set of real numbers that satisfies:

≤

for all real numbers and . Prove that for all ≤ . - September 6th 2011, 04:41 AMFernandoRevillaRe: Functional Inequality Proof
See problem 3 here:

2011 Imo Official Solutions

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