Erickson Schultz
05/11/2024 · High School

(a) Gegeben sei für \( x>0 \) die Funktion \( f(x)=x / \ln (x) \). (i) Besitzt \( f(x) \) Singularitäten (Polstellen) und wenn ja, wo? (ii) Hat \( f(x) \) lokale Extrema? Wemn ja, wo liegen diese ( \( x \)-Stelle angeben) und sind es lokale Minima oder Maxima? (4P) (b) Gegeben sei das Polynom \( f(x)=x^{3}-17 x^{2}-325 x+4301 \). Sie wissen, dass \( f(23)=0 \) ist. Finden Sie alle anderen Nullstellen mit Hilfe der Polynomdi- vision.

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(a) Die Funktion \( f(x) = \frac{x}{\ln(x)} \) hat eine Polstelle bei \( x = 1 \) und ein lokales Minimum bei \( x = e \). (b) Die Nullstellen des Polynoms \( f(x) = x^3 - 17x^2 - 325x + 4301 \) sind \( x = 23 \) und \( x = 11 \).

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