X^2+1/Lineare Tangenten/Aufgabe

Wir betrachten die Funktion

f\colon \mathbb {R} \longrightarrow \mathbb {R} ,\,x\longmapsto f(x)=x^{2}+1.

Bestimme die Tangenten an ${}f$ , die lineare Funktionen sind

(die also durch den Nullpunkt verlaufen).

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