Jawabanmu

2014-06-11T11:07:40+07:00
Persamaan garis singgung:
(x1 + 1)(x + 1) + (y1 - 3)(y - 3) = 13
(2 + 1)(x + 1) + (1 - 3)(y - 3) = 13
3(x + 1) - 2(y - 3) = 13
3x + 3 - 2y + 6 = 13
3x - 2y - 4 = 0
2014-06-11T11:12:18+07:00
2x+2+2y-6 = 13 2y = -2x+17 y = -x+17/2 m=y'=-1 titik (2,1) Pers. Garis singgung : y-y1 = m(x-x1) y-1 = -1(x-2) y-1 = -x+2 y = -x+3