Question

For the set A=

-4 a) list the elements of A
b) find n(A)
c) Is A finite or infinite?
HELP

Answer 1

a) A = {-3, -2, -1}

b) n(A) = 3

c) A is finite

Explanation:

a) The elements of A are the integers between -4 and 0, not including those values. Those integers are -3, -2, -1, so those are the elements of set A.

A = {-3, -2, -1}

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b) n(A) is the number of elements in set A. Obviously, there are 3:

n(A) = 3

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c) Since n(A) is not "infinity", the set A is finite.