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malfutka [58]
3 years ago
9

¿En cuál de los siguientes intervalos están solo los números reales que pertenecen a ] –3 , 5 ] y no pertenecen a [ –1 , 7 [?

Mathematics
1 answer:
vitfil [10]3 years ago
8 0

Complete question:

¿En cuál de los siguientes intervalos están solo los números reales que pertenecen a  ]- 3,5 ]   y no pertenecen a  [ –1 , 7 [  ?

A)  ]-3, -1[  

B)   ]- 3, -1 ]

C)  [-1,5]

D)  ]- 3,7[

E)  [5,7[

Answer:

A)  ]-3, -1[

Step-by-step explanation:

El intervalo ]- 3,5 ] incluye a todos los números que se encuentran entre -3 y 5. Es decir,

...-6  -5  -4  -3  -2  -1  0  1  2  3  4  5  6...

El intervalo  [–1 , 7[ excluye a los números que se encuentran entre -1 y 7, pero incluye a todos los números que sean menores a -1 y a todos los mayores a 7. Es decir,

...-7  -6  -5  -4  -3  -2  -1  0  1  2  3  4  5  6  7  8  9  10  11  12  13...

Para responder el problema, debemos encontrar aquellos números reales que se<u> </u><u>incluyan</u> dentro de <u>ambos intervalos</u>. Esto es,

            ]- 3,5 ] ...-6  -5  -4 <u> </u><u>-3  -2  -1</u>  0  1  2  3  4  5  6  7  8  9  10...

]- ∞ , -1[ ∪ [7,∞[...-6  -5  -4  <u>-3  -2  -1</u>  0  1  2  3  4  5  6  7 8  9  10...

Es decir que el intervalo  ]-3, -1[, corresponde a la intersección entre ambos conjuntos.

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