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Q.

STATEMENT – 1 : If the circles x2+y2+2gx+2fy=0 and x2+y2+2g1x+2f1y=0 are concentric gƒ1=ƒg1 and they represent same circle

STATEMENT- 2:  Let C be any circle with center (0,2). There can be atmost 2 points with rational coordinates on C.

STATEMENT- 3: Circle x2+y26x4y+9=0 bisects the circumference of the circle x2+y28x6y+23=0

STATEMENT- 4: If centre of first circle lie on the second circle then it bisects circumference of second circle
Which of the following must be truth value of above statements in that order.

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a

FTTF

b

TTTT

c

TTTF

d

TFTF

answer is D.

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Apply basic properties of circle

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STATEMENT – 1 : If the circles x2+y2+2gx+2fy=0 and x2+y2+2g1x+2f1y=0 are concentric gƒ1=ƒg1 and they represent same circleSTATEMENT- 2:  Let C be any circle with center (0,2). There can be atmost 2 points with rational coordinates on C.STATEMENT- 3: Circle x2+y2–6x–4y+9=0 bisects the circumference of the circle x2+y2−8x−6y+23=0STATEMENT- 4: If centre of first circle lie on the second circle then it bisects circumference of second circleWhich of the following must be truth value of above statements in that order.