Q.
Given that A≡(1,−1) and locus of B is x2+y2=16 . If P divides AB in the ratio 3:2 then locus of P is
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a
(x−2)2+(y−3)2=4
b
(x+1)2+(y−2)2=4
c
(x−3)2+(y−2)2=4
d
(3x+2)2+(3y−2)2=400
answer is D.
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Detailed Solution
Given point A(1,−1) and B lies on x2+y2=16 . Let point B be (x,y) and point P be (h,k) . ∴ (x,y)=3h+25,3k−25 Now B lies on x2+y2=16∴ 3h+252+3k−252=16∴ (3x+2)2+(3y−2)2=400, which is required locus.
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