1.

Consider 3 non-collinear points A(9,3), B(7,-1), and C(1,-1). Let P(a,b) be the center and R is the radius of circle 'S' passing through points A,B,C. Also H(barx,bary) are the coordinates of the othocentre of triangle ABC whose area be denoted by Delta. The value of a+b+R equals

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3
12
13
none of these

Answer :D


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