Here 9(y+6)=x2.9(y+6)=x^2.9(y+6)=x2. Hence y=x29−6.y=\frac{x^2}{9}-6.y=9x2−6. Hence y1=2x9,y2=29.y_1=\frac{2x}{9}, y_2=\frac{2}{9}.y1=92x,y2=92.
Hence center of curvature is (x−y1[1+y12]y2,y+1+y12y2)x-\frac{y_1[1+y_1^2]}{y_2}, y+\frac{1+y_1^2}{y_2})x−y2y1[1+y12],y+y21+y12) . Hence required coordinate is
(x−2x/92/9(1+4x281)x-\frac{2x/9}{2/9}(1+\frac{4x^2}{81})x−2/92x/9(1+814x2), y+1+4x2812/9y+\frac{1+\frac{4x^2}{81}}{2/9}y+2/91+814x2 )= (−4x3/81,y+9/2+2x29)-4x^3/81, y+9/2+\frac{2x^2}{9})−4x3/81,y+9/2+92x2)=(−4x3/81,3y+16.5-4x^3/81, 3y+16.5−4x3/81,3y+16.5 ) .
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