समीकरण 2x - ky + 7 = 0 और 6x - 12y + 15 = 0 का _____ के लिए कोई हल नहीं है।

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  1. k = -4
  2. k = 4
  3. k = 1
  4. k = -1

Answer (Detailed Solution Below)

Option 2 : k = 4
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अवधारणा:

यदि दो रैखिक समीकरण

​x + b1y ​= c1​ और ​x + b2y ​= c2 है, तब

(a) यदि ​​/a= b1​​/b​​= c1​​/c2 है, तब निकाय संगत है और इसके अपरिमित रूप से कई हल हैं।

(b) यदि ​​/a= b1​​/b≠ c1​​/c2 है, तब निकाय का कोई हल नहीं है और असंगत है।

गणना:

समीकरण 2x - ky + 7 = 0 और 6x - 12y + 15 = 0

2/6 = - k/-12 ≠ 7/15

2/6 = - k/-12 उपयोग करने पर,

⇒ k = 24/6 =  4

∴ k = 4 पर, समीकरण 2x - ky + 7 = 0 और 6x - 12y + 15 = 0 का कोई हल नहीं है।

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