The towel on the wall… It’s our ancient custom. There was not a single Ukrainian house , which would not be decorates with towels. A house without a towel was compared with a family without children. A towel symbolized not only aesthetic taste , it was a face of a house and of a hostess. The towels proved that the hostess was tidy and hard-working.
A newly-born child was handed with the towel, guests were met with bread and salt on the towel. A son , a husband, a father were seen off with the towel. While getting married the newly-formed family was standing on a towel too. Bread and salt on an embroidered towel were a symbol of hospitality of the Ukrainian people. To take the towel , to kiss bread symbolized unity, peace, love , understanding among people. This custom has a good tradition in our country.
Towel were used in different ceremonies and in everyday life as well: for wiping a face and hands, for drying dishes, for decorating the houses, for presenting dear people. The ornaments and colours of towels were different in different regions. A lot of songs about the embroidered towel have been created in Ukraine. Объяснение:
The towel on the wall… It’s our ancient custom. There was not a single Ukrainian house , which would not be decorates with towels. A house without a towel was compared with a family without children. A towel symbolized not only aesthetic taste , it was a face of a house and of a hostess. The towels proved that the hostess was tidy and hard-working.
A newly-born child was handed with the towel, guests were met with bread and salt on the towel. A son , a husband, a father were seen off with the towel. While getting married the newly-formed family was standing on a towel too. Bread and salt on an embroidered towel were a symbol of hospitality of the Ukrainian people. To take the towel , to kiss bread symbolized unity, peace, love , understanding among people. This custom has a good tradition in our country.
Towel were used in different ceremonies and in everyday life as well: for wiping a face and hands, for drying dishes, for decorating the houses, for presenting dear people. The ornaments and colours of towels were different in different regions. A lot of songs about the embroidered towel have been created in Ukraine. Объяснение:
Найдите наибольшее и наименьшее значения функции :
1) y = - x² - 3x - 6,25 = - 4 - ( x + 1,5 )²
2) y = - x² - x + 3,75 = 4 - ( x + 0,5 )²
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Исследуйте на четность функцию :
1) y = f(x) = - 8x + x² + x³
2) y = f(x) = √(x³ + x²) - 31*| x³ |
ответ: 1) max y = - 4 ; нет минимума
2) max y = 4 ; нет минимума
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ни четные ,ни нечетные
Объяснение:
1)
y = - x² - 3x - 6,25 = - ( x² +2x*(3/2) +(3/2)² - (3/2)²) - 6,25 =
= 9/4 -6,25 - ( x +3/2 )² =2,25 - 6,25 - ( x +3/2 )² = - 4 - ( x +3/2 )².
max y = - 4 , если ( x +3/2 )²=0 , т.е. если x = -3/2 = -1,5 ;
не имеет наименьшее значения
2)
y = - x² - x +3,75 = 4 - ( x + 0,5 )²
* * * y = - x² - x +3,75 = - ( x² +2x*(1/2) + (1/2)² - (1/2)² ) + 3,75 =
- ( x + 1/2 )² + 1/4 +3,75 = 4 - ( x + 0,5 )² * * *
max y = 4 , если x = - 0,5
не имеет наименьшее значения
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1) f(x) = - 8x + x² + x³ ; Область Определения Функции: D(f) = R
функция ни чётная ,ни нечётная
проверяем:
Функция является четной, когда f(x)=f(-x) , нечетной, когда f(-x)=-f(x)
а) f(-x) = - 8*(-x) +(- x)² +(- x)³ = 8x + x² - x³ ≠ f(-x)
Как видим, f(x)≠f(-x), значит функция не является четной.
б)
f(-x) ≠ - f(-x) → функция не является нечетной
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2) y = f(x) = √(x³ + x²) - 31*| x³ | , D(f) : x³ + x² ≥ 0 ⇔ x²(x+1) ≥ 0⇒x ≥ -1
ООФ не симметрично относительно начало координат
* * * не определен , если x ∈ ( - ∞ ; - 1) * * *