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JEE Mains · Maths · STD 11 - 9. straight line

यदि एक बिंदु, जो इस प्रकार चलता है कि इसकी रेखाओं \(x+2 y+7=0\) तथा \(2 x-y+8=0\) से दूरी बराबर रहती है, का बिंदुपथ \(x^2-y^2+2 h x y+2 g x+2 f y+c=0\) है, तो \(\mathrm{g}+\mathrm{c}+\mathrm{h}-\mathrm{f}\) का मान ........... है।

  1. A \(14\)
  2. B \(6\)
  3. C \(8\)
  4. D \(29\)
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Answer & Solution

Correct Answer

(A) \(14\)

Step-by-step Solution

Detailed explanation

Cocus of point \(\mathrm{P}(\mathrm{x}, \mathrm{y})\) whose distance from Gives \(\mathrm{X}+2 \mathrm{y}+7=0 \& 2 \mathrm{x}-\mathrm{y}+8=0\) are equal is \(\frac{x+2 y+7}{\sqrt{5}}= \pm \frac{2 x-y+8}{\sqrt{5}}\) \((x+2 y+7)^2-(2 x-y+8)^2=0\) Combined equation of lines…
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