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Which of the following intervals represents the set (1,4) u [2,6]?
a. (1,6]
b. (4,6]
c. [2,4)
d. (2,6]

Please show work,

Thanks!

Sagot :

Luanaidn
Set is a sum of two intervals :(1,4) u [2,6] 
In the first interval it is open on both sides so 1 and 4 don't belong to this interval, the second is closed so both 2 and 6 belong to interval and numbers between 2 and 6
We can write it as 1<x[tex] \leq 6[/tex]
summing both sets we have one set: (1,6]
so
a) represent our set
b) also represent because all numbers between 4-6 and 6 are in our set
c)also represent, all numbers are in main set
d)also represent
[tex](1;\ 4)\ \cup\ [2;\ 6]=(1;\ 6]\\\\Answer:A.[/tex]
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