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If $f$ and $g$ are continuous, non-negative functions on real line such that $f(x)>g(x)$ for all $x\in\mathbb{R}$. Can you find an example of $f$ and $g$ such that for all $C>1$, $f(x) < Cg(x)$.

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    Presumably, you meant "for each $C>1$, $f(x) for some $x\in\Bbb R$". In this case, consider a function with a horizontal asymptote $y=a$ with $a> 0$ whose graph lies above the asymptote.2012-12-20

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