Question

{x:x belongs to integers,xsquare-1=0} is empty or non empty set ,why

Answer 1

Answer:

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Step-by-step explanation:

x

2

+1=0

⇒x

2

=−1

⇒x=±i

i.e x is an imaginary number.

Hence {x:x is a real number and x

2

+1=0} is an empty set.