Andragradsfunktion med styrlinje och fokus

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Den här andragradsfunktionen har konstruerats med en styrlinje och en fokkuspunkt. Du kan undersöka hur funktionens utseende förändras när du flyttar fokuspunkten genom att dra i glidarna för a och b.

Du kan skapa en lika dan andragradsfunktion i GGB med kommandot:

Parabel[ <Punkt>, <Linje> ]

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