Super speed kettle nghĩa là gi
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15 tháng 3 2017
Ta có:P=(/x-3/+2)^2+(y+3)+2017
Ta thấy:/x-3/\(\ge\)0
\(\Rightarrow\)/x-3/+2\(\ge\)2
\(\Rightarrow\)(/x-3 +2)\(^2\)\(\ge\)4
y\(\ge\)0
\(\Rightarrow\)y+3\(\ge\)3
Do đó (/x-3/+2)\(^2\)\(\ge\)4+3+2017
=2024
Vậy giá trị nhỏ nhất của P là 2024\(\Leftrightarrow\)+, /x-3/=0
\(\Rightarrow\)x-3=0
x =0+3
x =3
+, y+3=0
y =0-3
y =-3
7 tháng 12 2021
1. All the paintings are displayed in the gallery by the painter.
2. The kettle is turned off by Jim.
3. The door is always locked by Peter before 9 p.m.
4. Are you taken to the airport by Jim?
5. How often is the room cleaned by Jane?
6. A long essay is rarely written by my brother.
7. Flowers are arranged beautifully by my aunt.
8. The new car is sometimes driven to work by Mr. Smith.
9. English is never spoken outside the classroom by me.
10. The gate is never opened.
11. Bottles are made from plastic.
12. The wedding photo is hung on the wall by Jane.
13. This place is guarded twenty-four hour a day.
14. Jim's blog is written and posted on social network site by him.
15. Winter wheat is harvested in late July.
S
_silverlining
CTVVIP
11 tháng 5 2022
Your future house will have a super smart TV, won't it?
Despite having tried our best, we didn't win the game
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