Ejercicios Blitzer

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Ejercicios Blitzer
[BL] Robert Blitzer
Precalculus
Pearson Prentice-Hall
Third edition
2007 USA
Pág. 14 Chapter P Prerequisites: Fundamental Concepts of Algebra
NOTA ya revisé pág. Exacta
Contendrá la revisión de los problemas de los archivos Mundial 01 al Mundial 04
EXERCíSE SET P.l
-------- Practice Exercises
~ In Exercises 1-16, evaluate each algebraic expression for the given value or
values of the variable(s).
x  10
[BL,14,1] 7  5 x, for
[BL,14,3] 6 x  y , for
[BL,14,5] x  3 x , for
2
x  3 and y  8
x 8
[BL,14,7] x  6 x  3 , for
2
[BL,14,9] 4  5 x  7  , for
3
x7
x 9
[BL,14,13]
5 x  2 
, for x  10
2 x  14
[BL,14,15]
2x  3y
, for x  2 and y  4
x 1
In Exercises 21-28, find the intersection ofthe sets.
[BL,14,21]
[BL,14,23]
[BL,15,27]
1,2,3,4 2,4,5
s, e, tt, e, s
a, b, c, d
In Exercises 29-34, find the union of the sets.
[BL,15,29]
[BL,15,31]
[BL,15,34]
1,2,3,4 2,4,5
1,3,5,72,4,6,8,10
e, m, p, t, y
In Exercises 35-38, list all numbers from the given set that are a. natural numbers, b.
whole numbers, c. integers, d. rational numbers, e. irrational numbers, f. real
numbers.
4


 9, ,0,0.25, 3, 9.2, 100 
5


[BL,15,35]


[BL,15,37]  11,
5

,0,0.75, 5, , 64 
6

Determine whether each statement in Exercises 43-50 is true or false.
[BL,15,43]
 13  2
[BL,15,47]
   
In the exercises 51-60 , rewrite each expression without the absolute bars
[BL,15,51]
300
[BL,15,53]
12  
[BL,15,55]
[BL,15,57]
2 5
3
3
En los ejercicios 67-74 expresar la distancia entre los números dados usando valor
absoluto. Después encontrar la distancia evaluando la expresión de valor absoluto.
[BL,15,73]
 3.6 y  1.4
En los ejercicios 75-84 indicar el nombre de la propiedad ilustrada
[BL,15,75] 6  (4)  (4)  6
[BL,15,81] 2(8  6)  16  12
En los ejercicios 85-96 simplificar cada expresión algebraica
[BL,15,85] 5(3 x  4)  4
[BL,15,87] 5(3 x  2)  12 x
[BL,15,89] 7(3 y  5)  2( 4 y  3)
[BL,15,91] 5(3 y  2)  (7 y  2)
[BL,15,93] 7  4[3  ( 4 y  5)]

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