Burgess Johnston
09/02/2023 · Middle School
Considera la funzione \( f: \mathbb{R} \rightarrow \mathrm{R} \) che fa corrispondere a un numero il suo opposto diminuito di 7 . a. Scrivi lespressione analitica di \( f \) e traccia il grafico della funzione. b. Calcola \( f(-7), f(7), f(0), f\left(\frac{6}{5}\right), f\left(-\frac{8}{3}\right) \).
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a. La funzione \( f \) è \( f(x) = -x - 7 \). Il grafico è una retta con coefficiente angolare negativo, interseca l'asse \( y \) in \( (0, -7) \).
b. I valori calcolati sono: \( f(-7) = 0 \), \( f(7) = -14 \), \( f(0) = -7 \), \( f\left(\frac{6}{5}\right) = -\frac{41}{5} \), \( f\left(-\frac{8}{3}\right) = -\frac{13}{3} \).
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