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

माना \(a, b, c\) तथा \(d\) शून्येतर संख्याएँ हैं। यदि रेखाओं \(4 a x+2 a y+c=0\) तथा \(5 b x+2 b y+d=0\) का प्रतिच्छेद बिंदु चौथे चतुर्थाश में है तथा दोनों अक्षों से समदूरस्थ है, तो:

  1. A \(3bc-2ad=0\)
  2. B \(3bc+2ad=0\)
  3. C \(2bc-3ad=0\)
  4. D \(2bc+3ad=0\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(3bc-2ad=0\)

Step-by-step Solution

Detailed explanation

Let coordinate of the intersection point in the fourth quadrant be \((\alpha,-\alpha)\) lies on both lines \(4 a x+2 a y+c=0\) and \(5 b x+2 b y+d=0\) \(\therefore 4 a \alpha-2 a \alpha+c=0 \Rightarrow \alpha=\frac{-c}{2 a} \ldots \ldots(i)\)…
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