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Q.

The internal centre of similitude of two circle (x+4)2+(y−1)2=1 ,(x−1)2+(y+2)2=9 is

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a

(1,5)

b

(32,−14)

c

(−32,14)

d

(−114,14)

answer is D.

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Detailed Solution

C1=(−4,1) C2=(1,−2)r1:r2=1:3=(1−124, −2+34)=(−114,14)
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