Relation of $e$ to other numbers...

70 Views Asked by At

I found the following result, When i was working on my calculator . $$x^y < y^x \quad ,x < y \quad \text{ for } x,y<e$$ $$x^y > y^x \quad ,x < y \quad \text{ for } x,y>e$$

I can't find a proof without convergence

1

There are 1 best solutions below

2
On

Hint: Take the logarithm: $y\ln x<x\ln y$ and consider the function $f(x)=\frac{\ln x}{x}$.