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Q.

S1: The equation of tangent at the point  P( −9 , −1)   to the circle x 2+y 2+ 4 x+8 y = 38     is  7 x −3 y + 60 = 0         

 S2: The equation of tangent at the point P( x 1 , y 1)  to the circle  x 2+y 2+ 2 g x+2 f y + c= 0    is  x x 1 + y y1 + g(x+x 1)+f(y+y1)+c = 0

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a

S2 is true and S1 is false 

b

Both S1 and S2 are true and S2 is correct explanation to S1

c

S1 is true and S2 is false

d

Both S1 and S2 are true but S2 is not correct explanation to S1

answer is A.

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Detailed Solution

Tangent:   x x 1 + y y1 + g(x+x 1)+f(y+y1)+c = 0

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