Question

The value of k for which the pair of linear equations 4x + 6y -1 =0 and 2x + ky - 7 = 0 represents parallel lines is .... A) 1 B) 2 C) 3 D) 4

Answer 1

for parallel a1/a1=b1/b1 ≠c1/c2.

so,

4/2=6/k ≠-1/-7

2=6/k

k=3

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