mk cần rất gấp ạ . mong bn giúp
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Những câu hỏi liên quan
22 tháng 8 2021
1: Ta có: \(\dfrac{1}{\sqrt{x}-1}+\dfrac{1}{\sqrt{x}+1}+1\)
\(=\dfrac{\sqrt{x}+1+\sqrt{x}-1+x-1}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}\)
\(=\dfrac{x+2\sqrt{x}-1}{x-1}\)
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1
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Đỗ Thanh Hải
CTVVIP
14 tháng 9 2021
1 knowing the answer, they told us
2 the unique handicraft, we didn't like it
3 We looked into these machines so that we could find out the method
We looked into these machines so as to find out the method
4 Jack's poverty, everyone looks up to him
5 In order to choose the best chair, Linda looked through this catalouge
6 is not as dirty as this one
7 I didn't play as successfully as Linda
8 A dog can't run as fast as a horse
A dog runs more slowly than a horse
9 No rivers in the world is as long as the Nile
10 No one in my family talks as politely as Linda
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0
PM
1
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Đỗ Thanh Hải
CTVVIP
12 tháng 9 2021
1 was arrested before the garden by the boy yesterday
2 his cats taken care of carefully by Jack everyday
3 Has the country been protected from Covid-19 successfully
4 is reported that the man is running out of money
is reported to be running out of money\
5 has been said that the thief got out of the prison
has been said to have got out of the prison
6 was thought that Mary had turned down the job
Mary was thought to have turned down the job
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3
30 tháng 8 2021
PTHH: 2Al + 6HCl → 2AlCl3 + 3H2
PTHH: Mg(OH)2 + 2HCl → MgCl2 + 2H2O
PTHH: Fe2O3 + 6HCl → 2FeCl3 + 3H2O
PTHH: K2O + 2HCl → 2KCl + H2O
30 tháng 8 2021
Lần sau em đăng câu hỏi đúng box để mọi người hỗ trợ nha
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1
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Đỗ Thanh Hải
CTVVIP
5 tháng 9 2021
1 is grown in many countries in the world
2 was invented by Graham bell many years ago
3 has been used for many years
4 Is English practiced by Lan everyday
5 will be taken out of the city
6 can this letter be sent by Mary 2 days ago
7 is being made from vegetables
8 must be finished before Sunday
9 hadn't been used for a long time
10 Will I be met at the airport by Jack tomorrow
12 It is thought that Maradona is.....
13 It has been believed that the job is.....
14 It was explained that this powerful.....
KC
1
VI,
1. The woman who was talking to my mother was very kind
2. This comoputer can be used by everyone in this office
3. Nam said that he would go to HN the following day
4. It takes Nga 4 hours a day to practicing E with her friends
5. If it didn't rains heavily, we weren't take our umbrella
I)1 The woman who was talking to my mother was very kind.
2 This computer can be used in this office.
3 Nam said that he would go to Ha Noi the next day.
4 It takes Nga four hours a day to practice English with her friends.
5 If it didn't rain heavily, we wouldn't take our umbrellas.
II)
His house looks very large and beautiful.
the doctor advised me not to stay up too late at night
When he lived in the city, he used to go to the theater twice a week.
It is necessary for you to practice English every day.
Do you mind if I borrow your car ?