[b][color=#ff7700][size=150]Tangentenbegriff erweitern[/size][/color][/b][br]Bevor die Lernenden den Übergang von der Sekante zur Tangente (nach)vollziehen können, müssen Sie zunächst ihr Verständnis des Begriffs Tangente erweitern: Von der bekannten geometrischen Bedeutung (Tangente an einen Kreis) hinzu einer analytischen Vorstellung:[br]Was ist überhaupt eine Tangente an einen Funktionsgraph? [br]-> lokale Berührende[br][br][img]data:image/png;base64,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[/img][size=150][color=#ff7700][b]Vorgehen mit dem GeoGebra-Applet Tangente:[/b][/color][/size] [br]Eigenschaften der Tangenten an einen Kreis reaktivieren, [br]auf einfache Situation an einer Parabel übertragen (Berührende schneidet Graph nicht)[br]und schließlich am Graph einer Funktion dritten Grades genauer fassen.[br][br]Daraus kann man dann gemeinsam folgern, dass ...[br]... die Steigung der Tangente an einen Funktionsgraph in einem Punkt der Steigung des Funktionsgraphs in dem Punkt entspricht.

[b][size=150][color=#1155cc]Link für SuS: [/color][color=#cc0000]GeoGebra-Arbeitsblatt:[/color][color=#1155cc] M1 AB II.2 Erweiterung des Begriffs Tangente[/color][/size][/b][br][url=https://www.geogebra.org/m/bxjvkqwm][img]data:image/png;base64,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[/img] https://www.geogebra.org/m/xgtavqm2[/url][br][br][b][size=150][color=#1155cc]Link für SuS: [/color][color=#cc0000]GeoGebra-Applet:[/color][color=#1155cc] M1 App II.2 Erweiterung des Begriffs Tangente[/color][/size][/b][br][url=https://www.geogebra.org/m/bxjvkqwm][img]data:image/png;base64,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[/img] https://www.geogebra.org/m/bxjvkqwm[/url]

[i][u]Quellen: [/u][br]Das obige Applet wurde erstellt von Jürgen Roth.[/i]