hoangnamdmx199 hoangnamdmx199
  • 14-05-2024
  • Mathematics
Answered

ở một thành phố có 1 số lớn hơn 1 đường ô tô xe buýt, biết rằng thỏa mãn các điều kiện sau: trên mỗi đường có đúng 3 bến đỗ. hai đường bất kì có 1 và chỉ 1 bến chung. hai bến bất kì bao giờ cũng có 1 và chỉ 1 đường nối chúng với nhau. hỏi trong thành phố có tất cả bao nhiêu đường ô tô xe buýt



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