Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**Harold****Guest**

What is the solution of this problem?and how is the problem solved-

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,723

Hi Harold;

This one has been around for a long time. The standard answer starts with raising both sides to the power of

after that it is a maxima-minima problem.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**Harold****Guest**

You mean e^e is always bigger than pi^pi?but why?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,723

Hi;

e^e is not greater than π^π. That is not what I said. You did something wrong with the first step.

From here it is an ugly calculus problem.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,548

Looks to me that y = x^(1/x) has a single maximum at x = e.

See graph and derivative graph.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**scientia****Member**- Registered: 2009-11-13
- Posts: 224

Let ; then when . So is decreasing for ; as , , i.e. .

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