QUESTION IMAGE
Question
the domain for f(x) and g(x) is the set of all real numbers. let f(x) = x² + 1 and g(x) = 3x. find f - g. a. x² + 3x + 1 b. x² - 3x + 1 c. 3x³ + 3x + 1 d. x² + 3x
Step1: Definir \( f - g \)
La operación \( f - g \) se define como \( (f - g)(x) = f(x) - g(x) \).
Dado \( f(x) = x^2 + 1 \) y \( g(x) = 3x \), sustituimos:
\( (f - g)(x) = (x^2 + 1) - 3x \)
Step2: Simplificar la expresión
Ordenamos los términos:
\( (f - g)(x) = x^2 - 3x + 1 \)
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B. \( x^2 - 3x + 1 \)