Question

Determine the vertex and the domain and range of the function 𝑓(𝑥) = 4𝑥 − 𝑋2

84

likes
421 views

Answer to a math question Determine the vertex and the domain and range of the function 𝑓(𝑥) = 4𝑥 − 𝑋2

Expert avatar
Sigrid
4.5
119 Answers
Primero, reescribimos la función en su forma estándar:
f(x) = -x^2 + 4x

Para encontrar el vértice de una parábola de la forma ax^2 + bx + c, usamos las fórmulas:

1. La coordenada x del vértice es x = -\frac{b}{2a}.

En nuestro caso:
a = -1, b = 4.

Entonces:
x = -\frac{4}{2(-1)} = 2

2. Para encontrar la coordenada y del vértice, sustituimos x en la función:
y = f(2) = -2^2 + 4(2) = -4 + 8 = 4

Entonces, el vértice es:
\left(2, 4\right)

El dominio de una función cuadrática ax^2 + bx + c siempre es:
(-\infty, \infty)

Para encontrar el recorrido, observamos el coeficiente principal a. Si a < 0, la parábola abre hacia abajo, con un máximo en el vértice.

Dado que a = -1 en nuestro caso, el recorrido es:
[4, \infty)

Respuesta:
El vértice de la función es \left(2,4\right).
El dominio es (-\infty, \infty).
El recorrido es [4, \infty).

Frequently asked questions (FAQs)
What is the average number of students participating in extracurricular activities in a school with 1000 students?
+
Math Question: Simplify √75 - √20 + √63
+
Question: How many real solutions does the equation f(x) = log x / f(x) = ln x have?(
+
New questions in Mathematics
The director of a company must transfer 6 people from the human resources department to the sales department, in order to sustain sales during the month of December. What is the probability that he will transfer only 2 of them?
2x-4y=-6; -4y+4y=-8
A soft drink machine outputs a mean of 23 ounces per cup. The machines output is normally distributed with a standard deviation of 3 ounces. What is the probability of filling a cup between 26 and 28 ounces round your answer to four decimal places
A job takes 9 workers 92 hours to finish. How many hours would it take 5 workers to complete the same job?
A test has 5 multiple choice questions. Each question has 4 alternatives, only one of which is correct. A student who did not study for the test randomly chooses one alternative for each question.(a) What is the probability of him getting a zero on the test?(b) What is the probability of him getting a three or more? The maximum mark for the test is 5, with each question worth one point.
In the telephone exchange of a certain university, calls come in at a rate of 5 every 2 minutes. Assuming a Poisson distribution, the average number of calls per second is: a) 1/8 b) 1/12 c) 1/10 d) 2/5 e) 1/24
Use linear approximation to estimate the value of the sine of 31o.
X³-27
Quadratic equation 2X = 15/X + 7
A contractor gives a bank note for $10250 at a rate of 1% for one month. How much interest is charged for 4 months?
factor the polynomial completely over the set of complex numbers b(x)=x^4-2x^3-17x^2+4x+30
Let N be the total number of ways to choose at least one ride, out of a total of 7 different ones, existing in an amusement park. Can it be said that N is a natural number equal to?
a) Statistics scores are normally distributed with the mean of 75 and standard deviation of 7. What is the probability that a student scores between 80 and 88
Oi👋🏻 Toque em "Criar Nova Tarefa" para enviar seu problema de matemática. Um dos nossos especialistas começará a trabalhar nisso imediatamente!
x²-7x+12=0
The following incoming payments show up at a tax inspection: 25 000€ on 19.01.2008, 140 000€ on 27.03.2008 and 19 000€ on a date that which is illegible, and 60 000€ on 15.06.2008. On which date did the payment of the 19 000€ appear, if on 30.06.2008 the money on the account (incl. interest at 4%) is 246 088.89€? Use simple interest and 30E/360 DCC. Solution: 45 days, 15.05.08
7-1=6 6x2=12 Explain that
A triangle is cut by a line s parallel to the base in such a way that it divides the side of the triangle into parts in the ratio of 2 : 3. Find the other side of the triangle if it is known that the line s divides it into parts whose length is 5 cm.
Mark is gluing a ribbon around the sides of a picture frame. The frame is 11 inches long and 7 includes wide. How much ribbon does Mark need?
13/25+7/16