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Find the centre and radius of each of the following circle : (i) x^(2)+y^(2)+4x-4y+1=0 (ii) 2x^(2)+2y^(2)-6x+xy-1=0 (iii) 2x^(2)+2y^(2)=3k(x+k) (iv) 3x^(2)+3y^(2)-5x-6y+4=0 (v) x^(2)+y^(2)-2ax-2by+a^(2)=0 |
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Answer» (iii) `C((3k)/(4),0),r=(sqrt(33))/(4)` , (IV) `C((5)/(6),1),r=(sqrt(13))/(6)` (v) C(a,b),r=b |
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