V3 x[ (V3-20) / (V3^2-18V3+80) ] =5
=> V3=......
K
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Những câu hỏi liên quan
AM
30 tháng 12 2021
Đổi đơn vị về m/s ta được
\(v_1=15\) m/s
\(v_2=10\) m/s
\(v_3=20\) m/s
\(\Rightarrow\) Đáp án: B
TH
1 tháng 12 2021
Present perfect (HTHT)
S + HAS/HAVE + V3/ED + O
S +HAS/HAVE + BEEN + V3/ED+ BY O
Future Simple (TLĐ)
S + WILL/SHALL + VO + O
WILL + BE + V3/ED + BY O
Present Continuous(HTTD)
S + AM/IS/ARE + V-ING + O
AM/IS/ARE +BEING + V3/ED + BY O
Simple present (HTĐ)
S + V 1/S/ES + O
AM/IS/ARE + PAST PARTICIPLE
Past continuous (QKTD)
WAS/WERE + BEING +PAST PARTICIPLE
PAST SIMPLE (QKĐ)
S + V 2/ED + O
WAS/WERE + V 3/ED
công thức đây ạ !
1. He has turned off the TV set.
The TV set has been turned off.
2. We receive e-mails every day.
E mails is received every day.
3. Nick is eating an ice-cream now.
An ice-cream is being eaten by Nick now.
4. She will lend Money to her friend.
Money will be lent to her friend.
5. I visit Paris every year.
Paris is visited every year.
6. He has already preapared the report.
The report has already been prepared.
7. He will copy this text.
This text will by copied
8. We are meeting the relatives now.
The relatives are meeting now.
9. They attend lectures every day.
Lectures are attended everyday.
10. Bill will bring sandwiches.
TA
1 tháng 12 2021
Present perfect (Hiện tại hoàn thành)
S + HAS/HAVE + V3/ED + O
S +HAS/HAVE + BEEN + V3/ED+ BY O
Future Simple (Tương lai đơn)
S + WILL/SHALL + VO + O
WILL + BE + V3/ED + BY O
Present Continuous(Hiện tại tiếp diễn)
S + AM/IS/ARE + V-ING + O
AM/IS/ARE +BEING + V3/ED + BY O
Simple present (Hiện tại đơn)
S + V 1/S/ES + O
AM/IS/ARE + PAST PARTICIPLE
Past continuous (Quá khứ tiếp diễn)
WAS/WERE + BEING +PAST PARTICIPLE
PAST SIMPLE (Quá khứ đơn)
S + V 2/ED + O
WAS/WERE + V 3/ED
công thức đây ạ !
1. He has turned off the TV set.
The TV set has been turned off.
2. We receive e-mails every day.
E mails is received every day.
3. Nick is eating an ice-cream now.
An ice-cream is being eaten by Nick now.
4. She will lend Money to her friend.
Money will be lent to her friend.
5. I visit Paris every year.
Paris is visited every year.
6. He has already preapared the report.
The report has already been prepared.
7. He will copy this text.
This text will by copied
8. We are meeting the relatives now.
The relatives are meeting now.
9. They attend lectures every day.
Lectures are attended everyday.
10. Bill will bring sandwiches.
Sandwiches wil be brought by Bill.
Công thức vs đáp án mik để đậm nha bn nhớ để ý ko là lẫn á :)
Ri-Chan
TH
1 tháng 12 2021
Present perfect (HTHT)
S + HAS/HAVE + V3/ED + O
S +HAS/HAVE + BEEN + V3/ED+ BY O
Future Simple (TLĐ)
S + WILL/SHALL + VO + O
WILL + BE + V3/ED + BY O
Present Continuous(HTTD)
S + AM/IS/ARE + V-ING + O
AM/IS/ARE +BEING + V3/ED + BY O
Simple present (HTĐ)
S + V 1/S/ES + O
AM/IS/ARE + PAST PARTICIPLE
Past continuous (QKTD)
WAS/WERE + BEING +PAST PARTICIPLE
PAST SIMPLE (QKĐ)
S + V 2/ED + O
WAS/WERE + V 3/ED
công thức đây ạ !
1. He has bought a new car.
A new car has been bought by him
2. We are playing volley-ball now.
Volley ball is being played (by us) now.
3. Our teacher explained the rule.
The rule was explained by our teacher
4. She translates the texts every day.
The texts is translated every day
5. She is watching a comedy film now.
A comedy is watching film now.
6. He put the candle on the table.
The candle is put on the table.
7. Pam has bought a new ring recently.
A new ring has been bought by pam recently.
8. He will correct the mistakes.
The mistakes will be corrected .
9. The cat dropped the vase yesterday.
The vase was dropped by the cat yesterday
10. I am playing the piano now.
The piano is playing now
TA
1 tháng 12 2021
Present perfect (Hiện tại hoàn thành)
S + HAS/HAVE + V3/ED + O
S +HAS/HAVE + BEEN + V3/ED+ BY O
Future Simple (Tương lai đơn)
S + WILL/SHALL + VO + O
WILL + BE + V3/ED + BY O
Present Continuous(Hiện tại tiếp diễn)
S + AM/IS/ARE + V-ING + O
AM/IS/ARE +BEING + V3/ED + BY O
Simple present (Hiện tại đơn)
S + V 1/S/ES + O
AM/IS/ARE + PAST PARTICIPLE
Past continuous (Qúa khứ tiếp diễn)
WAS/WERE + BEING +PAST PARTICIPLE
PAST SIMPLE (Qúa khứ đơn)
S + V 2/ED + O
WAS/WERE + V 3/ED
1. He has bought a new car.
=>A new car has been bought by him
2. We are playing volley-ball now.
=>Volley ball is being played (by us) now.
3. Our teacher explained the rule.
=>The rule was explained by our teacher
4. She translates the texts every day.
=>The texts is translated every day
5. She is watching a comedy film now.
=>A comedy is watching film now.
6. He put the candle on the table.
=>The candle is put on the table.
7. Pam has bought a new ring recently.
=>A new ring has been bought by pam recently.
8. He will correct the mistakes.
=>The mistakes will be corrected .
9. The cat dropped the vase yesterday.
=> The vase was dropped by the cat yesterday
10. I am playing the piano now.
=>The piano is playing now
Ri-chan
\(V_3\cdot\dfrac{V_3-20}{V_3^2-18V_3+80}=5\)
\(\Rightarrow V_3^2-20V_3=5V_3^2-90V_3+400\)
\(\Rightarrow4V_3^2-70V_3+400=0\)
\(\Rightarrow\)Vô nghiệm.