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Q.

Statement 1 : If a circle S = 0 intersects a hyperbola xy = 4 at four points. Three of them are (2, 2), (4, 1) and (6, 2/3), then coor- dinates of the fourth point are (1/4, 16)

Statement 2 : If a circle S = 0 intersects a hyperbola xy= c2 at t1 , t2 , t3 , t4 then t1 t2 t3 t4 =1
Then correct statement is

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a

Both the statements are True and II is the correct explanation of I

b

Both the statements are True but II is not the correct explanation of I

c

Statement-I is True and Statement-II is False

d

Statement-I is False and Statement-II is True

answer is D.

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Detailed Solution

Given hyperbola xy=c2 let c t, ct be any point on given hyperbola. Statement-I : xy=4                      c2=4                       c=2  t1(2, 2), t2(4, 1) t3(6, 23) are given three points                       t1=1, t2=2, t2=3 Now t1.t2.t3.t4=1  6t4=  t4=16 Now fourth point=ct4, ct4=13, 12  Statement I is false. we know that if a circle S=0 intersects hyperbola xy=c2 at t1, t2, t3, t4 then t1 t2 t3 t4=1  Statement II is true 

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