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JEE Main & Advanced Mathematics Complex Numbers and Quadratic Equations Question Bank Numerical Value Type Questions - Complex Numbers Quadratic Equations

  • question_answer
    If \[\frac{z-\alpha }{z+\alpha }\,\,(\alpha \in R)\] is a purely imaginary number and \[\left| z \right|=2,\] then a value of \[\alpha \] is

    Answer:

    2


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