- #1

ƒ(x) → ∞

- 25

- 0

## Homework Statement

But somehow not that simple..

[tex]\frac{5xy}{x+y}[/tex] [tex]=6\left.[/tex]

[tex]\frac{7yz}{y+z}[/tex] [tex]=10\left.[/tex]

[tex]\frac{8zx}{z+x}[/tex] [tex]=15\left.[/tex]

## Homework Equations

## The Attempt at a Solution

Tried and failed.