Question

If the line 2x+y-k=0 has to be tangent to the parabola x^2=4y then value of k must be​

Answer 1

Answer:

a =1

Equation of a line 2x+y-k=0

m=-2

Equation of tangent =y=mx+a/m

y=-2x+(-1/2)

2x+y+1/2=0

K=-1/2