A) 1
B) 2
C) 0
D) 3
Correct Answer: B
Solution :
Condition for pair of lines, \[abc+2fgh-a{{f}^{2}}-b{{g}^{2}}-c{{h}^{2}}=0\] Here, a = 12, h = ?5, b = 2, g = 11/2, f = ?5/2, c = k. On solving, \[k=2\].
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