Предмет: Математика, автор: meleknirvana79

22. Найдите сумму всех ВОЗМОЖНЫХ натуральных значений х, если периметр приведенного на рисунке треугольника меньше 26.​

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Ответы

Автор ответа: timofei9009900
1

Ответ:

x - 1 + 2x + x + 5 < 26 \\ 4x + 4 < 26 \\ 4x < 22 \\ x < 5 .5

1 < x < 5.5

x = 1 \\ x = 2 \\ x = 3 \\ x = 4 \\ x = 5 \\ \\ 1 + 2 + 3 + 4 + 5 = 15

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