Вопрос школьника по предмету Математика
приведите примеры подмножеств множества натуральных чисел N
Ответ учителя по предмету Математика
Рассмотрим простой пример. Пусть А, В, С — подмножества множества N: А={1, 2, 6, 18}; В={6, 1, 18}; С={2, 18, 6, 1},. В этом случае А = С; C ⊆ A и A ⊆ C, B ⊂ A..
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People say that fish are cold, but read this story to see that they can feel too.
Our friend went to another country on business. So we took her pet goldfish and put it in a bowl with our goldfith. They lived together for six months. When the friend came back, she took her goldfith home.
The next morning I found my goldfish on the surface, dead. Later that day my friend phoned to say that her goldfith was also dead.
I believe they died of a broken heart.