Question

Use the correct set/element notation symbol to make a true statement

Answer 1

(a)

Given data:

The given set is {-1, 6, 3,1, a}.

The set {a, 1, 7} is not subset of the given set.

`\mleft\lbrace a,\text{ 1, 7}\mright\rbrace⊄\mleft\{-1,6,3,1,a\mright\}`

Thus, the symbol must be used is ⊄.

(b)

Given data:

The given set is {3, 5,7,9}.

The number 3 is belongs to the given set.

`3\in\mleft\lbrace3,\text{ 5, 7, 9}\mright\rbrace`

Thus, the symbol used in the above expression is ∈.