3. [3 pts] Given n ≥ 3 circles on the plane, satisfying • Each two circles intersect at exactly 2 points; • No three cir
Posted: Tue Jul 12, 2022 12:53 pm
3. [3 pts] Given n ≥ 3 circles on the plane, satisfying • Each two circles intersect at exactly 2 points; • No three circles intersect at any point. These n circles divides the plane into how many parts?