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Maths-
General
Easy
Question
If the line is a tangent to the parabola then k=
1
2
3
4
Hint:
The parabola equation is simplest if the vertex is at the origin and the axis of symmetry is along the x-axis and y-axis. In parabola a line to be a tangent to parabola, condition is
The correct answer is: 1
Given Parabola : Comparing with standard equation of parabola 4ay = 4y a = 1 Given line : Comparing with standard equation of line
m = 1 and c = k In parabola a line to be a tangent to parabola, condition is Substituting these values Thus, If the line is a tangent to the parabola then k= 1