Предмет: Алгебра, автор: abdmtva

1-2+3-4+...+45-46+47=?

Ответы

Автор ответа: MizoriesKun

2

До 46 включительно имеем 23 пары ,каждая из которых равна

-1

1-2=-1

3-4=-1

5-6=-1 итд

23* (-1)+47= 24

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