# Proof Without Words: Steiner's Problem on the Number $$e$$

by Roger B. Nelsen (Lewis and Clark College)

This article originally appeared in:
Mathematics Magazine
April, 2009

Subject classification(s): Single Variable Calculus | Calculus
Applicable Course(s): 3.2 Mainstream Calculus II

For what positive number $$x$$ is the $$x$$-th root of $$x$$ the greatest?

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Capsule Course Topic(s):
One-Variable Calculus | Calculus Functions