Quiz about EXAMEN DE GRADO_MATEMÁTICA_3°BGU

Question 1

Resuelve:

$$\left(x+5\right)\left(x-5\right)$$

Accepted Answer

$$x^2-25$$

Answer

2x

Answer

$$x^2$$

Answer

2x-25

Question 2

Analiza el siguiente ejercicio y racionaliza:

$$\frac{2}{\sqrt{3}}$$

Accepted Answer

$$\frac{2\sqrt{3}}{3}$$

Answer

$$\frac{2\sqrt{5}}{5}$$

Answer

$$\frac{5\sqrt{3}}{3}$$

Answer

$$\frac{10\sqrt{3}}{5}$$

Question 3

$$Sea\ \left|2x+4\right|\le6\ ,\ halla\ el\ conjunto\ solución:$$

Accepted Answer

$$\left[-5,1\right]$$

Answer

$$\left[11,7\right]$$

Answer

$$\left[-11,-7\right]$$

Answer

$$\left(-11,7\right)$$

Question 4

Sea f(x)= $$\frac{x-1}{x+1}$$ , calcula f' (-3):

Accepted Answer

1/2

Answer

1/3

Answer

-1/4

Answer

-1/2

Question 5

Calcula el dominio de f(x)= $$\frac{3x-2}{2x-4}$$ :

Accepted Answer

$$R\ -\ \left\{2\right\}$$

Answer

$$R\ -\ \left\{-2\right\}$$

Answer

$$R\ -\ \left\{\frac{1}{2}\right\}$$

Answer

$$R\ -\ \left\{-\frac{1}{2}\right\}$$

Question 6

Encuentra el determinante de la Matriz A:

Accepted Answer

|A| = 41

Answer

|A| = -1

Answer

|A| = 7

Answer

|A| = -41

Question 7

Calcula los cortes con los ejes, de f(x)= 3x+1 :

Accepted Answer

(0, 1) ; (-1/3, 0)

Answer

(0, 3) ; (-3/2, 0)

Answer

(0, -3) ; (-3/2, 0)

Answer

(0, -3) ; (3/2, 0)

Question 8

Sean los vectores A=(3,-5,4) y B=(-2,0,6), calcular el producto punto entre ellos.

Accepted Answer

18

Answer

34

Answer

-18

Answer

24

Question 9

Dada las funciones f(x) = 2x²- 5x ; g(x) = 1 - 4x . Calcula f(-1) - g(0).

Accepted Answer

6

Answer

32

Answer

10

Answer

-12

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