/ Gib den Scheitelpunkt der zugehörigen Parabel an: «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»f«/mi»«mfenced»«mi»x«/mi»«/mfenced»«mo»=«/mo»«mo»#«/mo»«mi»a«/mi»«mo»§#183;«/mo»«msup»«mfenced»«mrow»«mo»#«/mo»«mi»k«/mi»«/mrow»«/mfenced»«mn»2«/mn»«/msup»«mo»+«/mo»«mo»#«/mo»«mi»e«/mi»«/math»

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