10-1.Circle and System of Circles
normal

वृत्त ${x^2} + {y^2} = {a^2}$ की उस जीवा का समीकरण जिसके मध्य बिन्दु $({x_1},{y_1})$ है, होगा

A

$x{y_1} + y{x_1} = {a^2}$

B

${x_1} + {y_1} = a$

C

$x{x_1} + y{y_1} = x_1^2 + y_1^2$

D

$x{x_1} + y{y_1} = {a^2}$

(IIT-1983)

Solution

(c) अभीष्ट जीवा का समीकरण $T = {S_1}$ है

अत: $x{x_1} + y{y_1} – {a^2} = x_1^2 + y_1^2 – {a^2}$

$ \Rightarrow x{x_1} + y{y_1} = x_1^2 + y_1^2$.

Standard 11
Mathematics

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