The line y = mx + 1 is a tangent to the curve y 2 = 4x if the value of m is
(A) 1 (B) 2 (C) 3 (D)
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let the straight line equation is ax+by+c=0
then slope =m= -a/b
here,
4x-2y=0
so, m= -4/-2
= 2
therefore, m=2 for y2=4x line
then slope =m= -a/b
here,
4x-2y=0
so, m= -4/-2
= 2
therefore, m=2 for y2=4x line
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