Question

consider the set
A={x:x is a real number and x^2+1=0}
B={x:x is a real number and x^2-16=0}
C={x:x is a real number and x^2=x+2}
which of the following is/are null net?​

Answer 1

Answer:

OPTION A would be the null set

Step-by-step explanation:

x**2+1=0

x**2=-1

x=root (-1)

ie x=i (i=complex number)

complex number doesnt fall in real numbers.....
rest all the options are real numbers on solving

hence A is null set