Question

4. The set {1, 0, 1} is not closed under which operation? (Points : 1)
multiplication
division
subtraction
all of the above

Answer 1

Do you know what the question means?

Answer 2

please check,the set must be {-1,0,1}

Answer 3

yes its negative my bad

Answer 4

{-1,0,1}

Answer 5

all

Answer 6

According to me its not closed under subtraction AND division.
1-(-1)=2 <---not in the set
1/0=infinity <---- not in the set.

Answer 7

but closed under multiplication.