ai giúp mk với ạ.mk đg cần gấp .Xin cảm ơn
có ai bt giải bài nàykhông giúp mk vs mk đg cần rất rất gấp mong các bn giúp cho ( xin cảm ơn)
5.
\(A=B\Leftrightarrow\left\{{}\begin{matrix}x-5\ge0\\x+2>0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ge5\\x>-2\end{matrix}\right.\Leftrightarrow x\ge5\)
6.
a, ĐK: \(\left\{{}\begin{matrix}2-\sqrt{x-1}\ge0\\x-1\ge0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}\sqrt{x-1}\le2\\x\ge1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\le5\\x\ge1\end{matrix}\right.\Leftrightarrow1\le x\le5\)
b, ĐK: \(\left\{{}\begin{matrix}x-2\ge0\\x-2\ne0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ge2\\x\ne2\end{matrix}\right.\Leftrightarrow x>2\)
c, ĐK: \(\left\{{}\begin{matrix}x^2-4\ge0\\x-2\ge0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ne\pm2\\x>2\end{matrix}\right.\Leftrightarrow x>2\)
d, ĐK: \(\left\{{}\begin{matrix}6x-1\ge0\\x+3\ge0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ge\dfrac{1}{6}\\x\ge-3\end{matrix}\right.\Leftrightarrow x\ge\dfrac{1}{6}\)
Giúp mk với mk đg cần gấp ai cảm ơn trc 😄
có ai bt giải bài này k mk đg cần rất rất gấp xin cảm ơn
\(n_{HCl}=\dfrac{1}{36,5}=0,027\left(mol\right)\)
\(n_{NaOH}=\dfrac{1}{40}=0,025\left(mol\right)\)
\(HCl+NaOH\rightarrow NaCl+H_2O\)
Lập tỉ lệ : \(\dfrac{0,027}{1}>\dfrac{0,025}{1}\)=> Sau phản ứng HCl dư
Vậy khi nhúng quỳ tím vào dung dịch sau phản ứng, quỳ tím hóa đỏ
Ta có: HCl + NaOH → NaCl + H2O
=> Quỳ tím ko chuyển màu
Mọi người ơi giúp mk vs ạ mk đg cần gấp
Cho mk xin cấu trúc so sánh hơn vs ạ
Mk cảm ơn !!!
Chào Minh Anh Can nhé!
Cấu trúc so sánh hơn trong tiếng Anh
Cấu trúc với tính từ ngắn (Short Adj): thêm đuôi “er” vào sau tính từ hoặc phó từ ngắn.
S + V + adj/adv + er + than + N/pronoun
Lưu ý: Với tính từ có âm tận cùng là “y” thì phải đổi thành “i” thêm “er” và nó bị coi là tính từ ngắn. Ex: pretty => prettier
Trong trường hợp tính từ ngắn có 1 nguyên âm kẹp giữa 2 phụ âm tận cùng thì phải gấp đôi phụ âm cuối. Ex: big => bigger
Tính từ dài (Long Adj): thêm more/less.
S + V + more/less + adj/adv + than + N/pronoun
Ex: Lan is more beautiful than me.
Chúc em học vui vẻ và có nhiều trải nghiệm bổ ích tại Hoc24.vn nhé!
Giúp mk với ! Mk đg cần gấp cảm ơn trc nha
Giúp mk với ạ mk đg cần gấp !!! Cảm ơn trc nha
Giúp mk với pls mk đg cần gấp cảm ơn trc nha
Giúp mk với mk đg cần gấp T-T cảm ơn trc nha
có ai bt lm bài này giúp mk vs mk đg cần rất rất gấp xin cảm ơn
III. Make a complex sentence from each pair of sentences. Use the subordinator provided in brackets and make any necessary changes.
1. There are modern knitting machines. The artisans in my village like using traditional looms
( although) ……………………………………………………………………………………
2. Many children like to go to Bat Trang Ceramic village. They can make their own pottery there. (as)
……………………………………………………………………………………………………..
3. We have to follow more than ten stages. We can make a simple conical hat.
(so that)……………………………………………………………………………………………
( so as to)…………………………………………………………………………………………………
4. Sinh paintings are special. They are burned after worship. (since)
………………………………………………………………………………………….
IV. Rewrite the sentences
Question 1. They don’t send him abroad to study.
He___________________________________________________
Question 2. She used this room for watching film last year.
This room____________________________________________
Question 3. Study hard or you’ll fail the exam.
ð If_______________________________________________________ .
Question 4. I don’t see you very often because you live so far.
ð If_______________________________________________________ .
Question5. I didn’t have enough money, so I didn’t buy that skirt.
If_________________________________________________________ .
ð Question 6. If We don’t practice English very often , we can’t communicate with foreigners.
Unless_____________________________________________________ .
Question 7. Unless I met you now, I couldn’t go on working
ð If _____________________________________________________________________
Question 8: They studied English well so that they could find a good job in the future
=> ( so as to ) ___________________________________________________
V. Viết lại câu
1. Since Jack studied hard, he passed the exam
Þ Because of ……………………………………………..
2. Because of putting on warm clothes, they didn’t feel cold
Þ Because……………………………………………
3. I set up a company since I had enough money
Þ Due to……………………………………………………..
4. Because of not being happy, she turned down the invitation
Þ Since……………………………………………………….
5. We couldn’t put up with the boredom due to not living in the city
Þ Because ……………………………………………………………...
6. Although I turned up late, I knew everything
Þ Despite ………………………………………….
7. In spite of having a headache, he switched on the TV
=> Even though…………………………………………………………………
8. Because she was ill, she didn’t to school.
- Because of .............................................................................................................................
9. He didn’t come because he was sick.
- He didn’t come because of...........................................................................................................
10. She ate much because she was hungry.
Tham Khảo
Ex3
1)→ Although there are modern knitting machines, the artisans in my village like using traditional looms
2)→ Many children like to go to Bat Trang Ceramic village as they can make their own pottery there
3)→ We have to follow more than ten stages so that we can make a simple conical hat
4)→ Sinh paintings are special since they are burned after worship
Ai giúp mk vs ạ, mk đg cần gấp lắm. Mk cảm ơn ạ
Câu 2 sửa lại R'=50 Ohm
I=1A
Bài 1:
\(R=U:I=15:0,1=150\Omega\)
\(\Rightarrow R_b=R-R'=150-50=100\Omega\)
\(I=I'=I_b=0,1A\left(R'ntR_b\right)\)
\(\left\{{}\begin{matrix}U'=R'.I'=50.0,1=5V\\U_b=R_b.I_b=100.0,1=10V\end{matrix}\right.\)
\(I_{sau}=I+0,15=0,1+0,15=0,25A\)
\(\Rightarrow R_{bsau}=U_b:I_{sau}=10:0,25=40\Omega\)
Bài 2:
\(R=U:I=25:1=25\Omega\)
\(\Rightarrow\dfrac{1}{R_b}=\dfrac{1}{R}-\dfrac{1}{R'}=\dfrac{1}{25}-\dfrac{1}{50}=\dfrac{1}{50}\Rightarrow R_b=50\Omega\)
\(U=U'=U_b=25V\)(R'//Rb)
\(\left\{{}\begin{matrix}I'=U':R'=25:50=0,5A\\I_b=U_b:R_b=25:50=0,5A\end{matrix}\right.\)