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NDA2010MathematicsDeterminantsActual

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

Options

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

Correct answer

B. b=2 a

Step-by-step solution

The correct answer is option (B).

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