30-Day Sprint138 / 143
HardCalculus & Linear Algebra

Maximize x^(1/x)

Jane StreetSIG / Susquehanna

What value of x > 0 maximizes x1/xx^{1/x}? (Enter a decimal.)

Hints

Take logs first, then differentiate lnxx\frac{\ln x}{x}.

The answer is a famous constant.

Sign in to reveal the full worked solution, check your answer instantly, and track your progress with spaced-repetition review.