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Nam usually has lunch at 11.30
giúp mình nha .mơn các bạn nhìu
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TT
17 tháng 3
Lina has three meals a day: breakfast, lunch and dinner. She usually has breakfast at home. She has bread, eggs and milk for breakfast. At school, Lina and her friends have lunch at half past eleven. They often have fish or meat and vegetables for lunch. Lina has dinner with her parents at home at seven o'clock. They often have meat, fish or chicken and vegetables for dinner. After dinner, they eat some fruit and drink tea. She likes dinner because it is a big and happy meal of the day
TT
17 tháng 8 2020
Ta có : \(x^3+3x^2+3x=0\)
\(\Leftrightarrow x.\left(x^2+3x+3\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x^2+3x+3=0\end{cases}\Leftrightarrow}x=0\)
17 tháng 8 2020
x3 + 3x2 + 3x = 0
<=> x( x2 + 3x + 3 ) = 0
<=> \(\orbr{\begin{cases}x=0\\x^2+3x+3=0\left(1\right)\end{cases}}\)
Ta có (1) = x2 + 3x + 3
= ( x2 + 3x + 9/4 ) + 3/4
= ( x + 3/2 )2 + 3/4 ≥ 3/4 > 0 ∀ x
=> (1) vô nghiệm
Vậy phương trình có nghiệm duy nhất là x = 0
LN
1
13 tháng 1 2018
=> 4-24 = x-9
=> x-9 = -20
=> x = -20 + 9 = -11
Vậy x = -11
Tk mk nha
DT
Đỗ Thanh Hải
CTVVIP
6 tháng 10 2021
1 What time is it
2 When do you have Chemistry
3 What time does your family have lunch
4 Where are they playing soccer
5 What subject is Quang studying
6 How are the children going to the museum
7 How many books does the school library have
8 Where can I find newspaper
9 tháng 5 2017
ta có x-y+2xy=3<=>2x-2y+4xy=6<=>2x(2y+1)-(2y+1)=5<=>(2x-1)(2y+1)=7
Vì (2x-1)(2y+1)=7 => \(2x-1\inƯ\left(7\right)\)={1,-1,7,-7}{}
=>\(x\in\){1,0,4,-3}=> y\(\in\){3,-4,0,-1}
10 tháng 5 2017
Ta có:
x - y + 2xy = 3
Suy ra 2x - 2y + 4xy = 6
Suy ra 2x( 2y + 1 ) - ( 2y + 1 ) = 5
Suy ra ( 2x - 1 ) ( 2y + 1 ) = 7
Vì ( 2x - 1 ) ( 2y + 1 ) = 7
Suy ra 2x -1 thuộc Ư (7) = { 1 ; -1 ; 7 ; -7 }
Suy ra x thuộc { 1 ; 0 ; 4 ; -3 }
y thuộc { 3 ; -4 ; 0 ; -1 }
what time does Nam usually has lunch?
1. What time does Nam usually have lunch?
2. How often does Nam usually have lunch at 11.30?