Question

5 Реши задачу. N M Х Из города Мв город N ведут три дороги, а из города N в город Х - две дороги. Сколько путей, проходящих через N, ведут из Мв Х? В этом году построили ещё по одной дороге между городами М и N, N и х. Сколько теперь получится вариантов? Пж полный ответ, и обяснение​

Answer 1

Ответ:

Пошаговое объяснение:

M N X

Из М в N три дороги

изN в X две дороги

изМ пойдем по первой дороге

доходим до N ,отсюда можем идти

по первой или по второй дороге т.е.

каждой из трех дорог соответствует

две , путей будет 3×2=6

если прибавили по одной дороге,

получается 4 и 3

вариантов будет 4×3=12

Answer 2

Problem Analysis

We are given that there are three roads leading from city M to city N, and two roads leading from city N to city X. We need to determine the number of paths that pass through N from M to X. Additionally, we are told that one road each has been built between cities M and N, and N and X. We need to find the new number of possible paths after these additional roads are built.

Solution

To find the number of paths from M to X passing through N, we can multiply the number of paths from M to N by the number of paths from N to X. Since there are three roads from M to N and two roads from N to X, there are a total of 3 * 2 = 6 paths from M to X passing through N.

After the additional roads are built, there will be four roads from M to N and three roads from N to X. Therefore, the new number of possible paths from M to X passing through N will be 4 * 3 = 12 paths.

Conclusion

In summary, there are 6 paths from city M to city X passing through city N before the additional roads are built. After the additional roads are built, the number of paths increases to 12.