MikailaP550103 MikailaP550103

29-10-2022
Mathematics

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Find the cardinal number for the set.A = {6, 12, 18,..., 42}The set is infinite.O n(A) = 4n(A) = 42O n(A) = 7

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HarumiE171278 HarumiE171278

29-10-2022

Notice that the arrangement of numbers present in the set is some multiples of 6, therefore the complete set is:

[tex]A=\mleft\lbrace6,12,18,24,30,36,42\mright\rbrace\text{.}[/tex]

Therefore the number of elements of A is 7.

Answer: n(A)=7.

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