- A5
- B3
- C4
- D7
Step-by-Step Solution
For infinitely many solutions, 2/(k−1) = 3/6 = 7/14 = 1/2. So 2/(k−1) = 1/2 ⇒ k − 1 = 4 ⇒ k = 5.
Answer: A) 5
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