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Suppose that A denotes the collection of all complex numbers whose square is a negative real number. Which one of the following statements is correct ?A. `A sube R`B. `A supe R`C. `A={x+iy|x^(2)inR|x, yinR}`D. `A={iy|yinR}`

Answer» Correct Answer - D
If A denotes the collection of all complex number whose square is a negative number, then
Square of a complex number is a negative real number only if has no real part and has only imaginary part.
Hence, A={iy : `y in R`)


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