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Dennis_Churaev [7]
2 years ago
9

Use the roster method to write each of the given sets. (Enter EMPTY for the empty set.)

Mathematics
1 answer:
Kitty [74]2 years ago
6 0

Answer:

a) Empty set

b)  \{x : x \in N \text{ and } x < 13\}                                        

Step-by-step explanation:

Roster form is a comma separated list form of set.

a) The set of natural numbers x that satisfy x + 4 = 1.  

x + 4 = 1\\x = -3 \notin N

Thus, x is an empty set.

b) set-builder notation for the set  {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

We use x to represent this set. Now x belongs to natural number and is less than equal to 12.

Thus, it can be written as:

\{x : x \in N \text{ and } x < 13\}

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