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33. \( \begin{array}{l}\text { Камень бросают в глубокое ущелье. При этом в первую } \\ \text { секунду он пролетает } 15 \text { метров, а в каждую следующую } \\ \text { секунду на } 10 \text { метров больше, чем в предыдущую, до тех } \\ \text { пор, пока не достигнет дна ущелья. Сколько метров } \\ \text { пролетит камень за первые четыре секунды? }\end{array} \)

Ask by Smith Floyd. in Russia
Feb 26,2025

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Камень пролетит 120 метров за первые четыре секунды.

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В первую секунду камень пролетает 15 метров. Во вторую секунду он пролетает на 10 метров больше, то есть 25 метров. В третью секунду пролетает 35 метров (25 + 10), а в четвертую — 45 метров (35 + 10). Теперь складываем пройденные расстояния за первые четыре секунды: 15 + 25 + 35 + 45 = 120 метров. Итак, за первые четыре секунды камень пролетит 120 метров!

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