Es sei [ a , b ] {\displaystyle {}[a,b]} ein reelles Intervall und es seien x , y ∈ [ a , b ] {\displaystyle {}x,y\in [a,b]} . Zeige
![{\displaystyle {}[a,b]}](https://wikimedia.org/api/rest_v1/media/math/render/svg/8e5a6e660b5cdc1a9c76f6e6b0d486328c3f6937)
![{\displaystyle {}x,y\in [a,b]}](https://wikimedia.org/api/rest_v1/media/math/render/svg/91e18bbfbe19b695d78c9d6a1a361645c6269573)
