Question

heya...solve this....
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Answer 1

concept:-If a1x +b1y+c1=0 and a2x+b2y+c2 are two lines conjugate with respect to any parabola,then their is a relation between coefficients of x and y as

a1c2+a2c1=2ab1b2

Solution:-using this concept we can say

2×k+12×1=2×a×3×-1

comparing with equation of parabola y^2=4ax,we can say

4ax=8x

a=2

2k+12=2×2×3×-1

2k=-12-12

k=-12

Answer 2

here's your answer in the given attachment(s)