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Question 94

Se tienen las funciones [tex]\( f(x) = -2x^2 + \frac{3}{2}x + 3 \)[/tex] y [tex]\( g(x) = -\frac{3}{2}x^2 + \frac{5}{2}x - 1 \)[/tex].

¿Cuál es el resultado al resolver [tex]\( g(x) - f(x) \)[/tex] para [tex]\( x = 2 \)[/tex]?

A. -8

B. -4

C. 0

D. 8


Sagot :

Para resolver el problema, primero necesitamos evaluar las funciones [tex]\( f(x) \)[/tex] y [tex]\( g(x) \)[/tex] en [tex]\( x = 2 \)[/tex]. Luego, encontraremos la diferencia [tex]\( g(x) - f(x) \)[/tex] para ese valor de [tex]\( x \)[/tex].

Dadas las funciones:

[tex]\[ f(x) = -2 x^2 + \frac{3}{2} x + 3 \][/tex]
[tex]\[ g(x) = -\frac{3}{2} x^2 + \frac{5}{2} x - 1 \][/tex]

Primero evaluamos [tex]\( f(2) \)[/tex]:

[tex]\[ f(2) = -2 (2)^2 + \frac{3}{2} (2) + 3 \][/tex]
[tex]\[ f(2) = -2 (4) + 3 + 3 \][/tex]
[tex]\[ f(2) = -8 + 3 + 3 \][/tex]
[tex]\[ f(2) = -2 \][/tex]

Ahora evaluamos [tex]\( g(2) \)[/tex]:

[tex]\[ g(2) = -\frac{3}{2} (2)^2 + \frac{5}{2} (2) - 1 \][/tex]
[tex]\[ g(2) = -\frac{3}{2} (4) + 5 - 1 \][/tex]
[tex]\[ g(2) = -6 + 5 - 1 \][/tex]
[tex]\[ g(2) = -2 \][/tex]

Ahora calculamos [tex]\( g(2) - f(2) \)[/tex]:

[tex]\[ g(2) - f(2) = -2 - (-2) \][/tex]
[tex]\[ g(2) - f(2) = -2 + 2 \][/tex]
[tex]\[ g(2) - f(2) = 0 \][/tex]

Por lo tanto, al resolver [tex]\( g(x) - f(x) \)[/tex] para [tex]\( x = 2 \)[/tex], obtenemos:

[tex]\[ \boxed{0} \][/tex]

La respuesta correcta es la opción [tex]\( C. 0 \)[/tex].
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