defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Lines Family of Lines

For l ∈ ℝ, the equation (2l − 3)x2 + 2lxy − y2 = 0 represents a pair of lines

1
only when l = 0
2
for all values of l ∈ R − (−3, 1)
3
for all values of l ∈ (−3, 1)
4
for all values of l ∈ R
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