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Equation of circle in Complex Form

If the line x...

Question

If the line x+2by+7=0 is a diameter of the circle $x^{2} + y^{2} - 6 x + 2 y = 0$ , then b=

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-5

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-1

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Solution

The correct option is D
5

$C e n t r e (3, - 1) 3 - 2 b + 7 = 0 ∴ b = 5$

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x^{2} + y^{2} - 6 x + 2 y = 0

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x^{2} + y^{2} - 6 x + 2 y = 0.

\sqrt{10}

2 x + y = 5

x^{2} + y^{2} - 6 x + 2 y = 0

x^{2} + y^{2} - 6 x + 2 y = 0.

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