the pair of lines represented by 2x+y+3=0 and 4x+kx+6=0 will be parallel for what value of 'k'
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Given, the lines are parallel
=> a1/a2 = b1/b2 = c1/c2
=> 2/4 = 1/k = 3/6
=> 1/2 = 1/k = 1/2
=> k = 2
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