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Q.The condition that the pair of lines ax2+2hxy+by2+2gx+2fy+c=0ax^2 + 2hxy + by^2 + 2gx + 2fy + c = 0 may touch the circle x2+y2=r2x^2 + y^2 = r^2 is

a
r2=g2+f2−cr^2 = g^2 + f^2 - c
b
r2=g2+f2+cr^2 = g^2 + f^2 + c
c
r2=c(a+b)r^2 = c(a + b)
d
r2=cr^2 = c

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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