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Hochpunkt, Tiefpunkt Sattelpunkt
Begriffserklärungen zu Hochpunkt, Tiefpunkt und Sattelpunkt.
Erarbeitung des Vorzeichenwechselkriteriums.
Vielen Dank an Merschhemke [url]http://tube.geogebra.org/user/profile/id/345956 [/url] für die das Applet