Gujarati
10-1.Circle and System of Circles
easy

यदि वृत्त ${x^2} + {y^2} = {a^2}$ तथा ${x^2} + {y^2} - 2gx + {g^2} - {b^2} = 0$ एक-दूसरे को बाह्यत: स्पर्श करते हों, तो

A

$g = ab$

B

${g^2} = {a^2} + {b^2}$

C

${g^2} = ab$

D

$g = a + b$

Solution

(d) प्रतिबन्ध के अनुसार,

$\sqrt {{{(g – 0)}^2} + {{(0 – 0)}^2}}  = a + b $

$\Rightarrow g = a + b$.

Standard 11
Mathematics

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