JEE Main & Advanced Mathematics Complex Numbers and Quadratic Equations Question Bank Integral power of iota, Algebraic operations and Equality of complex numbers

  • question_answer If z and\[{z}'\] are complex numbers such that \[z.z'=z\], then \[z'=\]

    A) \[0+i\,0\]

    B) \[1+0i\]

    C) \[0+i\]

    D) \[1+i\]

    Correct Answer: B

    Solution :

    According to condition \[{z}'\] is multiplicative identity therefore\[{z}'=1+0i\].

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