10TH•Mathematics•Complex Numbers•Question 1

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Multiplicative inverse of $z = 1 + i$ is: (a) $1 - i$ (b) $i$ (c) $\dfrac{1}{2} - \dfrac{1}{2}i$ (d) $-\dfrac{1}{\sqrt{2}} + \dfrac{1}{\sqrt{2}}i$

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