2015 Chongqing Question 12 Free-response Differentiating 2015_省自主命题(重庆) 12.若点P(1,2)在以坐标原点为圆心的圆上,则该圆在点P处的切线方程为 Answer key$x + 2 y - 5 = 0$ ☆ SaveCan't do it, show the explanation查看原卷 →