Esercitazione test università

Esercitazione test università

12th Grade

13 Qs

quiz-placeholder

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Esercitazione test università

Esercitazione test università

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

LORENZI DENIS

Used 9+ times

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

L'insieme delle soluzioni della disequazione

 log2x>4\log_2x>-4  è dato da:

 A={xR: x>24}A=\left\{x\in R:\ x>-2^4\right\}  

 A={xR: x>24}A=\left\{x\in R:\ x>2^{-4}\right\}  

 A={xR: x>2}A=\left\{x\in R:\ x>-2\right\}  

 A={xR: x>42}A=\left\{x\in R:\ x>-4^2\right\}  

 A={xR}A=\left\{x\in R\right\}  

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Per quale valore del parametro k le rette di equazione

 y=4x+3y=4x+3  e  kx+3y+4=0kx+3y+4=0  sono perpendicolari?

 14-\frac{1}{4}  

-12

 34\frac{3}{4}  

4

 43\frac{4}{3}  

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Quante soluzioni ha l'equazione  3(2x2)=03^{\left(2-x^2\right)}=0  ?

Due

Infinite

Una

Nessuna

Quattro

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Abbiamo 6 numeri di media aritmetica m. Aggiungendo un ulteriore numero x, la media viene aumentata di 4. Possiamo concludere che:

x=4mx=4m

x=m+28x=m+28

x=m6+4x=\frac{m}{6}+4

x=7m+3x=7m+3

x=6m+3x=6m+3

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

L'equazione  x24x2x2=0\frac{x^2-4}{x^2-x-2}=0  ha per soluzioni:

x = 2  x = -2

x = 2  x = -1

x = -2

x = 2

x = -2  x = -1

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

La frazione  \frac{\log_27}{\log_249}  è uguale a:

 12\frac{1}{2}  

 log2 17\log_2\ \frac{1}{7}  

 17\frac{1}{7}  

 log242-\log_242  

 log7 (22)\log_7\ \left(2^2\right)  

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Quanti sono i punti di intersezione tra il grafico della funzione y=2xy=\frac{2}{x}  e quello della funzione  y=3x+1y=3^x+1  ?


1

2

3

4

0

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