The Position Relationship between Circle and Circle in Senior High School Mathematics
This is judged according to the number of times a circle intersects with another. Each circle can be represented by an equation, and two circles have two equations, so there may be two, one or no solutions. Where there is intersection, there is a solution; where there are two intersections, there are two solutions; where there is no intersection, there is no solution. When [r 1-R2]