Primero Medio, Numeración, Evaluación

Primero Medio, Numeración, Evaluación

8th Grade - University

20 Qs

quiz-placeholder

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Primero Medio, Numeración, Evaluación

Primero Medio, Numeración, Evaluación

Assessment

Quiz

Mathematics

8th Grade - University

Hard

Created by

Jaime Lara

Used 43+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt


 (3)2(3)3=\left(-3\right)^2-\left(-3\right)^3=  

-15

-18

18

-36

36

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Si  99=3x9\cdot9=3^x , entonces x = 

2

3

4

5

27

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Si 3x+3x=p3^x+3^{-x}=p , entonces  9x+9x9^x+9^{-x} es igual a  


 p2p^2  

 p2+2p^2+2  

 p22p^2-2  

 p21p^2-1  

3p

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

¿En cuál(es) de las siguientes expresiones el valor de x es -3?
I)  4x=1644^x=\frac{1}{64}  

II)  434x=14^3\cdot4^x=1  

III)  (41)x=64\left(4^{-1}\right)^x=64  

Solo en I

Solo en II

Solo en III

Solo en I y en II

En I, en II y en III

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Sea n un número entero. ¿Cuál(es) de las siguientes afirmaciones es (son) siempre verdadera(s)?
I)  2n2^n  es un número entero divisible por 2.

II)  12n\frac{1}{2^n}  es un número menor que 1.

III)  2n2(n1)=2(n1)2^n-2^{\left(n-1\right)}=2^{\left(n-1\right)}  

Solo I

Solo II

Solo III

Solo I y II

Ninguno de ellas

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Si a = -4, b = -2 y c = -3, entonces a2b3 : bc2=-a^2-b^3\ :\ b\cdot c^2=   

-180

-52

-20

 49-\frac{4}{9}  

20

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 t4m+2u62t+3m3u+7=-t-4m+2u-6-2t+3m-3u+7=  



 3tmu+1-3t-m-u+1  

 3tm+u1-3t-m+u-1  

 3t+mu+1-3t+m-u+1  

 3t+m+u+1-3t+m+u+1  

 3tmu1-3t-m-u-1  

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