Question

Which of the following is the empty set
x xe R x-5x+6=0}
xxe R and x2 + 1 = 0}
{XXER X2 - 1 = 0)
xxe R and x2 - 9 = 0​

Answer 1

Answer:

Step-by-step explanation:

For x  

2

=−1 all x must be complex. But since domain of x is real option D is a null set.