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Pre Calculus Questions & Answers

Q:
Multiple Choice 5 points Which function below represents the inverse function of \( y=\ln \left(\frac{x-3}{4}\right)-2 ? \) \( y^{-1}=\frac{1}{4} e^{x-3}+2 \) \( y^{-1}=10^{4 x+3}+2 \) \( y^{-1}=4 e^{x+2}+3 \) \( y^{-1}=4 e^{x+2}+12 \)
Q:
13. Dada la función \( f(x)=\log _{2} x \) Sin utilizar tablas de valores dibuja las funciones: \( g(x)=3+\log _{2} x \) \( h(x)=-1+\log _{2} x \) \( m(x)=\log _{2}(x+2) \) \( f(x)=\log _{2}(x-4) \)
Q:
12. Representa las funciones siguientes: \( \begin{array}{ll}\text { a) } f(x)=\log x & \text { d) } m(x)=\log _{4} x \\ \text { b) } g(x)=\ln x & \text { e) } n(x)=\log _{0^{\prime} 5} x \\ \text { c) } h(x)=\log _{1^{\prime} 5} x & \text { f) } p(x)=\log _{0^{\prime} 2} x\end{array} \)
Q:
What are the features of the function \( f(x)=-3^{x}+4 \) graphed below?
Q:
are the features of the function \( f(x)=-3^{x}+4 \) graphed below?
Q:
If \( f(x)=2^{x} \), find \( f(2) \) and \( f(-2) \)
Q:
2. Un envase de lata cerrado tiene un volumen de \( 50 \mathrm{~cm}^{2} \); tiene la forma de un cilindro circular recto. Determina un modelo matemático que exprese el área de la superficie total \( (S) \) del envase como una función del radio de la base \( (r) \). \( \begin{array}{ll}\text { a) } S(r)=\frac{100}{r}+2 \pi r^{2} & \text { b) } S(r)=\frac{50}{r}+2 \pi r^{2} \\ \text { c) } S(r)=\frac{100}{r}+\pi r^{2} & \text { d) } S(r)=\frac{50}{r}+\pi r^{2}\end{array} \)
Q:
Un envase de lata cerrado tiene un votumen de \( 50 \mathrm{~cm}^{2} \), tiene la forma de un cilindro circular recto. Determina un modelo matemático que exprese el área de la superficie total (S) del envase como una funcibin del radio de la base \( (t) \). \( \begin{array}{ll}\text { a) } S(r)=\frac{100}{r}+2 \pi^{2} & \text { b) } S(r)=\frac{50}{r}+2 \pi r^{2} \\ \text { c) } S(r)=\frac{100}{r}+\pi r^{2} & \text { (d) } S(r)=\frac{50}{r}+\pi r^{2}\end{array} \)
Q:
A farmer depreciates a \( \$ 126,000 \) tractor. The estimated resale value \( V(t) \) (in \( \$ 1000 \) ) of the tractor \( t \) years after purchase is \( 80 \% \) of its value from the previous year. Therefore, the resale value can be approximated by \( V(t)=126(0.8)^{t} \). Part: \( 0 / 2 \) Part 1 of 2 (a) Find the resale value 7 yr after purchase. Round to the nearest \( \$ 1000 \). Do not round intermediate calculations. The resale value of the tractor 7 yr after purchase will be approximately \( \$ \)
Q:
Tarea: Graficar las siguientes ecuaciones: - \( f(x)=2^{x} \) - \( f(x)=3^{x+1}-2 \)

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