Question
यदि $z = (\lambda + 3) + i\sqrt {5 - {\lambda ^2},} $ तो $z$ का बिन्दुपथ है,
${(x - 3)^2} = {\lambda ^2}$ ......$(i) $
एवं ${y^2} = 5 - {\lambda ^2}$ ......$(ii)$
$ (i)$ व $(ii)$ से ${(x - 3)^2} = 5 - {y^2}$
$⇒ {(x - 3)^2} + {y^2} = 5$.
स्पष्टत: यह एक वृत्त है।
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