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KCET2023MathematicsSets and Relations

Which of the following is an empty set?

Options

  1. Ax: x^2+1=0, x R
  2. Bx: x^2-9=0, x R
  3. Cx: x^2=x+2 x R
  4. Dx: x^2-1=0, x R

Correct answer

A. x: x^2+1=0, x R

Step-by-step solution

Here, x^2+1=0 array ll & x^2=-1 & x = i array It x is an imaginary number. Hence, x: x . is a real number and .x^2+1=0 is an empty set

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