\(\)Giúp mình vs...cần gấp
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16 tháng 3 2020
\(\left(x+3\right)^2+\left(0,5y-1\right)^2=0\)
Do \(\left(x+3\right)^2\ge0;\left(0,5y-1\right)^2\ge0\)
\(\Rightarrow\left(x+3\right)^2+\left(0,5y-1\right)^2=0\)
\(\Leftrightarrow\hept{\begin{cases}\left(x+3\right)^2=0\\\left(0,5y-1\right)^2=0\end{cases}\Leftrightarrow}\hept{\begin{cases}x+3=0\\0,5y-1=0\end{cases}\Leftrightarrow}\hept{\begin{cases}x=-3\\y=2\end{cases}}\)
...
IA
16 tháng 3 2020
Vì \(\hept{\begin{cases}\left(x+3\right)^2\ge0\forall x\\\left(0.5y-1\right)^2\ge0\forall y\end{cases}}\)
\(\Rightarrow\left(x+3\right)^2+\left(0.5y-1\right)^2\ge0\forall x,y\)
Mà \(\left(x+3\right)^2+\left(0.5y-1\right)^2=0\)
\(\Rightarrow\hept{\begin{cases}x+3=0\\0.5y-1=0\end{cases}\Leftrightarrow}\hept{\begin{cases}x=-3\\y=2\end{cases}}\)
Vậy ...
DV
7
27 tháng 2 2018
6 giờ 35 phút + 4 giờ 18 phút = 10 giờ 53 phút
CHÚC BẠN HỌC TỐT!!!!!
27 tháng 2 2018
nghĩ 1 cách đơn giản thì
6 giờ 35 phút + 4 giờ 18 phút = gần 11 giờ :))
29 tháng 9 2016
vietnam is famous with its traditional and delicious dishes. All of them easioly bring to anyone's mouth indeed, but as myself, I enjoy spring rolls best. Spring rolls are lightly fried rice - paper rolls, smaller and crispier than Chinese egg rolls but more flavorful. They are filled with highly seasond morsels of crab, shrimp, chopped vegetables, onion, mushroom, vermicelli and eggs. To prepare them, place the above mentioned filling on a thin rice pancake, roll up then fry. Finally, spring rolls, when fully prepared, are wrapped into somes kinds of fresh vegetables, then doused in fish sauce. My mother ussually cooks spring rolls for me, espeicially on important days in year, such as Tet holiday. when I eat them, i feel all of my mother's love that she reserves for me. To me, they're like the most speicial dish in this world.
29 tháng 9 2016
My favourite food is Pho. Pho is the most popular food among the population and it plays an importance thing in the spirit of Vietnamese people, especially the people who live in Ha Noi. Anyone feels hungry in a short time in the morning can also
enjoy a bowl of hot and spicy Pho to fill their empty stomach. Have many Pho but there are two main kind of Pho: Pho with beef and Pho with chicken. The ingredients of Pho are rice noodles and borth which is generally made by simmering bones, flanlsteak charred onion and spices, it takes several hours to prepare. When people eat Pho they can add some kind of thing such as chilli, peper,"dam"...I love Pho very much I can eat it everyday without boring. I'm sure that you do it, too. Wherever in Vietnam Pho is special food. I like most of drink! But my favorite drink is fruit juice because I like fruits. They are healthy, fresh and delicious! Especially, I like minute made which is made 100 % of fruits. It costs 120 yen. It is little expensive, but it is so delicious and healthy. My father likes too. I want to have it now. Have you ever drunk it? If you have never drunk it, I want you to drink it! I recommend you it! Recently, I like tea because my friends and my father like it very much. I am influenced by them. I didn't like tea until high school student. But now, I like milk tea, apple tea and fruit tea. I am glad to be able to have it.
(KHÔNG CHÉP MẠNG NHA!)
SS
16 tháng 1 2022
C= 1-2+3-4+5-6+... -2016
C=(1-2)+(3-4)+(5-6)+......+(2015-2016)
C=(-1)+(-1)+(-1)+....+(-1) ( có 1008 số -1)
C=(-1) x 1008
C=-1008
ủa sách này sao khác thế nhỉ?
Khác j?