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

  • question_answer The multiplication inverse of a number is the number itself, then its initial value is   [RPET 2003]

    A) i

    B) - 1

    C) 2

    D) - i

    Correct Answer: B

    Solution :

    We know that, multiplicative inverse of \[x+iy\] is \[\frac{1}{x+iy}\] According to question \[x+iy=\frac{1}{x+iy}\] and only (b) is satisfying such condition.


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