Quantitative Aptitude – Equation – Let k be a constant. The equations kx + y


Slot – 3 – Quantitative Aptitude – Equation – Let k be a constant. The equations kx + y


Q. Let k be a constant. The equations kx + y = 3 and 4x + ky = 4 have a unique solution if and only if?
  1. k = 2
  2. |k| ≠ 2
  3. |k| = 2
  4. k ≠ 2
Answer: |k| ≠ 2

Solution:
For unique solution,
a1/a2 ≠ b1/b2
k/4 ≠ 1/k
k^2 ≠ 4
|k| ≠ 2


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