Денис разбил треугольник на девять треугольничков, как показано на рисунке, и расставил в них числа, при этом в белых треугольниках числа оказались равны суммам чисел в соседних с ними (по сторонам) серых треугольниках. После этого Лёша стёр числа 1, 2, 3, 4, 5 и 6 и вместо них написал буквы A, B, C, D, E и F в некотором порядке. Получившаяся расстановка чисел и букв изображена на рисунке. Где какие числа стояли первоначально?
Для создания пары сперва нажмите на одну из строк левого столбца, а затем на необходимую строку в правом. Каждой строке в левом столбце соответствует ровна одна строка в правом.
Вместо буквы A
Вместо буквы B
Вместо буквы C
Вместо буквы D
Вместо буквы E
Вместо буквы F
стояло число 1
стояло число 2
стояло число 3
стояло число 4
стояло число 5
стояло число 6
ответ: 6 часов и 12 часов.
Объяснение:
Пусть второй каменщик сделает работу за х часов, а первый - за у часов. Тогда по условию, x - y = 6. Производительность труда первого каменщика равна , а производительность труда второго каменщика равна . Зная, что они за 2 часа выложат половину стены, составим и решим систему уравнений
Умножим левую и правую части уравнения на 2x(x-6) ≠ 0
По теореме Виета
— не удовлетворяет условию;
часов потребуется выложить стену второму каменщику;
Первому каменщику потребуется 12 - 6 = 6 часов.
ответ: 6 часов и 12 часов.
阿迪爾汗
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are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom
is my mother. She has baked a delicious strawberry pie.
are my grandparents. They are riding bikes.
is our house. I can see it from here.
are my parents. My Mom’s name is Ann and my father’s name is Tom