Repaso de Funciones II 4º ESO

Repaso de Funciones II 4º ESO

10th Grade

10 Qs

quiz-placeholder

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Repaso de Funciones II 4º ESO

Repaso de Funciones II 4º ESO

Assessment

Quiz

Mathematics

10th Grade

Hard

Created by

Beatriz Babe

Used 12+ times

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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

El dominio de la siguiente función es:
 f(x)=2x23x3+3x2+3x+1f(x)=\frac{2x^2-3}{x^3+3x^2+3x+1}  

 D(f)= (, +)D\left(f\right)=\ \left(-\infty,\ +\infty\right)  

 D(f)=(, 1)U(1, +)D\left(f\right)=\left(-\infty,\ -1\right)U\left(-1,\ +\infty\right)  

 D(f)= (, 1)U (1, +)D\left(f\right)=\ \left(-\infty,\ 1\right)U\ \left(1,\ +\infty\right)  

 D(f)= (1, 1)D\left(f\right)=\ \left(-1,\ 1\right)  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

El dominio de la siguiente función, es:
 f(x)=x26x+8f\left(x\right)=\sqrt{x^2-6x+8}  

 D(f)=[2, 4] D\left(f\right)=\left[2,\ 4\right]\   

 D(f)=(, +)D\left(f\right)=\left(-\infty,\ +\infty\right)  

 D (f)= (, 2] U [4, +)D\ \left(f\right)=\ \left(-\infty,\ 2\right]\ U\ \left[4,\ +\infty\right)  

 D(f) = (, 2) U (4, +)D\left(f\right)\ =\ \left(-\infty,\ 2\right)\ U\ \left(4,\ +\infty\right)  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 f(x)= x+9f\left(x\right)=\ \sqrt{x+9}  Dada esta función, marca la opcion correcta: 

 D (f)= [9, +)         R(f)=[0, +)D\ \left(f\right)=\ \left[-9,\ +\infty\right)\ \ \ \ \ \ \ \ \ R\left(f\right)=\left[0,\ +\infty\right)  

 D (f)=(, 9]            R(f)= (0, +)D\ \left(f\right)=\left(-\infty,\ -9\right]\ \ \ \ \ \ \ \ \ \ \ \ R\left(f\right)=\ \left(0,\ +\infty\right)  

 D (f)=(, +)           R(f)= (, 0)D\ \left(f\right)=\left(-\infty,\ +\infty\right)\ \ \ \ \ \ \ \ \ \ \ R\left(f\right)=\ \left(-\infty,\ 0\right)  

 D (f)=(9, )      R(f)= (, +)D\ \left(f\right)=\left(9,\ -\infty\right)\ \ \ \ \ \ R\left(f\right)=\ \left(-\infty,\ +\infty\right)  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Los puntos de corte de la función son:  f(x)=2x3 8xf\left(x\right)=2x^3\ -8x  

(0, 0) ; (2, 0) ; (-2, 0) 

(0, 0) ; (0, 2) ; (-2, 0)

( 0,0) ; ( 0, 2) ; (0, -2)

Es una polinómica que no corta a los ejes

5.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

 f(x) = 12x1     g(x)= 2x12x+1f\left(x\right)\ =\ \frac{1}{2x-1}\ \ \ \ \ g\left(x\right)=\ \frac{2x-1}{2x+1}  Marca las opciones correctas 

 (f + g)= 2x4x\left(f\ +\ g\right)=\ \frac{2x}{4x}  

 (f+g)=4x22x+24x21\left(f+g\right)=\frac{4x^2-2x+2}{4x^2-1}  

 (fg)=4x22x4x21\left(f-g\right)=\frac{-4x^2-2x}{4x^2-1}  

 (fg)=2x2\left(f-g\right)=\frac{-2x}{-2}  

6.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

f(x) = 12x1 g(x)= 2x12x+1f\left(x\right)\ =\ \frac{1}{2x-1}\ \ \ \ \ g\left(x\right)=\ \frac{2x-1}{2x+1} Marca las opciones correctas

(f g)= 2x14x21\left(f\ ·\ g\right)=\ \frac{2x-1}{4x^2-1}

(f g)=2x+14x2+1\left(f·\ g\right)=\frac{2x+1}{4x^2+1}

(f: g)=2x +14x2+1\left(f:\ g\right)=\frac{2x\ +1}{4x^2+1}

(f: g)=2x+14x24x+1\left(f:\ g\right)=\frac{2x+1}{4x^2-4x+1}

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 f(x) =1x     g(x)= 2xf\left(x\right)\ =\frac{1}{x}\ \ \ \ \ g\left(x\right)=\ 2x  Marca la opcion correcta

 (g o f)=21x\left(g\ o\ f\right)=\frac{2}{\frac{1}{x}}  

 (g o f)=2x\left(g\ o\ f\right)=\frac{2}{x}  

 (g o f)=12x\left(g\ o\ f\right)=\frac{1}{2x}  

 (g o f)=2xx\left(g\ o\ f\right)=\frac{2x}{x}  

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