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Question 7. A circle with centre in the first quadrant is
as these three lines are tangent to the circle therefore perpendicular distance from (h,k) will be same for the three lines let the distance be r ( radius of the circle ) . when you will solve them you will get k = rFrom x=0 and you will be left with the two equations from the other two lines and the two variable h and r Solve them to get the answerRemember [h ,k(r) > 0 ] as stated in the question .
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