Question

1. Which of the following is an
empty set?
a. {X:XER,x^2-1=0}
b. {x:XER and x^2+1=0}

c. {X:XERand (x) ^2-4=0}
d. {x:xERand x^2-x-2=0}​

Answer 1

the option B is an empty set

hope it helps.....

Answer 2

Answer:

I'm not a sure my answer, but I think,

Step-by-step explanation:

B, is an empty set.