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4 tháng 12 2017
Bích Hoàng Ngọc Bảo bạn có thể trình bày rõ ra cho mình được ko
PD
1
7 tháng 12 2016
2x + 5 ⋮ x + 2 <=> 2( x + 2 ) + 1 ⋮ x + 2
Vì 2( x + 2 ) ⋮ x + 2 Để 2( x + 2 ) + 1 ⋮ x + 2 <=> 1 ⋮ x + 2
=> x + 2 là ước của 1 => Ư(1) = { -1 ; 1 }
Ta có : x + 2 = 1 => x = -1
x + 2 = - 1 => x = -3
Vậy x = { -1;'-3 }
9 tháng 3 2020
1+2-3+4-....+99-100
=1+(2-3)+(4-5)+....+(99-100) có 50 cặp và số 1
=1+(-1)+(-1)+....+(-1)
=1+50x(-1)
=1-50
=-49
10 tháng 1 2022
Refer:
My house has a lot of room like living room, kitchen, dinning room, etc. But, L love my bedroom the most. It's on the second floor in my house. In this room, there is a bed where I often sleep well every night. It is beautiful and it's made from wood. Next to my bed is my big desk where I learn and do exercise every day. On the desk, there are my books and notebooks to study at school and at extra classes. Besides, there is a large wooden bookshelf next to my desk. It help me relax and search information. Also, there is a wooden wardrobe in my room which has a lot of clothes. Those are everything in my bedroom. I love it a lot because it's a place where I always relax after a hard studyng-day. Beside, I have got a lot of sweet memories in this room like the happy memory about my sleeping party with my classmates. In conclusion, it is clear that my favourite room in my house is my bedroom.
10 tháng 1 2022
My house is not very big; therefore all of the rooms also have a small size. My bedroom is on the second floor, and there are not many things in it. I choose a light grey color for my room to make it look clean. In the corner of the room is my bed; right on the wall next to it is a small window with white curtain. On the opposite corner is a table which I use to sit and study, and above the table is a bookshelf where I put my textbooks, novels, and comics that I like to read. On the right of the bed is a big wardrobe where I store all of my clothes and other things, and it also has a big mirror on it so I can get dress easily. Next to the wardrobe is a small bathroom, so it is very convenient for me to go to the toilet at night. My room is just that simple, but I love it very much.
DN
0
20 tháng 12 2015
1011= 100...0(11 số 0)
=> 1011 có 12 số
các bạn cho mình vài li-ke cho tròn 360 với
20 tháng 1 2022
10FeSO4 + 2KMnO4 + 8H2SO4 --> K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 8H2O
| 2Fe+2 -2e--> Fe2+3 | x5 |
| Mn+7 +5e--> Mn+2 | x2 |