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NDA 2010
Exam
NDA
Year
2010
Subject
Mathematics
Chapter
Determinants

NDA 2010 · Mathematics · Determinants

If the system of equations 2 x+3 y=7 and 2 a x+(a+b) y=28 has...

If the system of equations 2x+3y=72 x+3 y=7 and 2ax+(a+b)y=282 a x+(a+b) y=28 has infinitely many solutions, then which one of the following is correct?

Options

  1. Aa=2ba=2 b
  2. Bb=2ab=2 a
  3. Ca=−2ba=-2 b
  4. Db=−2ab=-2 a

Correct answer

B. b=2ab=2 a

Step-by-step solution

The correct answer is option (B).
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