Question

let sets A and B be defined as follows. A={-27, -26, -25, -24, -23} B is the set of integers greater than or equal to -6 and less than or equal to -3

Answer 1

Cardinality of n(A) = 5 (Since there are 5 elements in the set)

Cardinality of n(B) = 4 (Since there are 4 elements in the set. B={-6, -5, -4, -3} )

-18 ∈ A is false as it is not included among the values of the set.

-3 ∈ B is true as -3 is an element of B.

-26 ∈ A is true as it is included among the values of the set.

2 ∉ B is true as the number is not included among the values of the set.