रेखा 3x – 4y + 12 = 0 और 3x – 4y = 6 के बीच में रेखा का समीकरण क्या है?

  1. 3x – 4y – 9 = 0
  2. 3x – 4y + 9 = 0
  3. 3x – 4y – 3 = 0
  4. 3x – 4y + 3 = 0

Answer (Detailed Solution Below)

Option 4 : 3x – 4y + 3 = 0
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संकल्पना:

दो समानांतर रेखा ax + by + c1 = 0 और ax + by + c2 = 0 के बीच की दूरी  है। 

 

गणना:

हमारे पास 3x – 4y + 12 = 0 और 3x – 4y = 6⇒ 3x – 4y - 6 = 0 हैं। 

∴ उनके बीच की दूरी = 

= 18/5

 

 

माना कि, दी गयी रेखाओं के बीच में रेखा का समीकरण 3x - 4y + c = 0 है। 

चूँकि यह मध्य में है, तो रेखा 3x – 4y + 12 = 0 से दूरी होगी। 

अब, 9/5 =

⇒ 12 - c = 9

⇒ c = 3

अतः विकल्प (4) सही है।  

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