Question

Let sets A and B be defined as follows. A is the set of integers greater than -8 and less than -4.B={b,h,i,l,r,s}

Answer 1

A

Concept

The cardinality of a set is a measure of the "number of elements" of the set. For example, the set contains 3 elements, and therefore. has a cardinality of 3.

Set A is the set of integers greater than -8 and less than -4.

Therefore set A = {-7, -6, -5,}

-7 is greater than -8 and -5 is less than -4 from the number line.

Therefore, set A = { -7, -6, -5 }

B = {b, h, i, l. r, s }

Cardinalities of

n(A) = 3 n(B) = 6

B

`\begin{gathered} -5\text{ }E\text{ A = true} \\ -12\text{ E A = false} \\ b\text{ E B = true} \\ t\text{ }\\otin\text{ B = true} \end{gathered}`