giúp mik nha mn cảm ơn trước
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T
1
DT
Đỗ Thanh Hải
CTVVIP
19 tháng 8 2021
Bạn sai cta nhé, sắp not xắp
Tham khảo
1. A special kind of tea is sold here
2. All the cars and trucks have been searched
3. He was put in prison by the goverment last years
4. We will be met by her parents at the station tomorrow
5. A meeting is being held by Mr. Brown in the hall
Bài 2
1 Tea can't be made with cold water
2 Some of my books have been taken away.
3 Some pictures were taken away by the boys.
4 This room may be used for the classroom.
5 This machine mustn't be used after 5:30 p.m
6 Mr Cole used to be visited at weekends by John.
7 All the homework ought to be done by her
NT
3
4 tháng 12 2021
Độ dãn của lò xo:
\(F_{đh}=k\cdot\Delta l\Rightarrow\Delta l=\dfrac{F_{đh}}{k}=\dfrac{2}{100}=0,02\)m=2cm
12 tháng 7 2023
3:
1: \(A=\dfrac{x\left(x^2+3\right)-\left(x^2+3\right)}{x^3\left(x+3\right)+3\left(x+3\right)}=\dfrac{\left(x^2+3\right)\left(x-1\right)}{\left(x+3\right)\left(x^2+3\right)}\)
\(=\dfrac{x-1}{x+3}\)
2: A=-1
=>x-1=-x-3
=>2x=-2
=>x=-1(nhận)
3: Khi x=-2 thì \(A=\dfrac{-2-1}{-2+3}=-3\)
MM
giúp mik với mik cảm ơn trước nha :">
7
NT
1
TK
13 tháng 12 2021
Câu 1:
a,MCD: R1//R2
\(R_{12}=\dfrac{R_1R_2}{R_1+R_2}=\dfrac{30\cdot20}{30+20}=12\left(\Omega\right)\)
b, MCD: R3nt(R1//R2)
\(R_{tđ}=R_3+R_{12}=30+12=42\left(\Omega\right)\)
Câu 2
a Điện trở và cường độ dòng điện tối đa mà biến trở đó có thể có
b,\(S=\dfrac{l\cdot\rho}{R}=\dfrac{100\cdot1,1\cdot10^{-6}}{200}=5,5\cdot10^{-7}\)
\(R=\sqrt{\dfrac{S}{\pi}}=\sqrt{\dfrac{5,5\cdot10^{-7}}{\pi}}=4,18\cdot10^{-4}\left(m\right)=0,418\left(mm\right)\)
5. The teacher advised Nam to do morning exercises regularly.
6. My mother told me to clean up the bedroom.
7. The doctor advised Lan not to eat too much meat.
8, My mother asked me to wait for her there.
9. Miss Jackson said Tim should work harder on English pronunciation.
10. The manager invited me to drink some coffee.
1.Lan asked me if i went to school by bike
2.They said that they wanted to meet Mr Nam the following week
3. Mrs Hoa asked Ba not to stay up too late
4.He told me to carry heavy bag for him
5. The doctor advised my father not to drink too much coffee in the evening