(i) The equation of the polor of (5,-1) with respect to C
(ii) The equation of the tangent at (8,0) to C
(iii) The equation of the normal at (2,6) to C
(iv) The equation of the diameter of C through (8,12)
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(1) y=0
(2) y=6
(3) x+y=7
(4) 13x+5y=98
(5) x=8
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