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DT
Đỗ Thanh Hải
CTVVIP
22 tháng 5 2021
III
1 went
2 often goes
3 didn't do
4 doesn't do
5 often talk
6 Did you talk
7 didnt speak
8 doesn't speak
9 did she live
10 do you live
11 did you last meet
12 meets
13 am - eat
14 was
15 sells
16 sold
17 often wait
18 waited
19 visited
20 did - visit
IV
1 failed
2 has taught
3 haven't finished
4 finished
5 didn't speak
6 sold
7 has lived
8Have you already done
9 has she lived - left
10 haven't found - left
11 did - see
12 have waited
13 has been
14 has met
15 has taught
16 took
17 Did - tell
18 didn't come
19 did - go
20 has already drunk
TQ
22 tháng 5 2021
1.went
2.often.goes
3.didn't.do
4.has.not.did
5.often.talk
(máy.tính.bị.hỏng.dấu.cách.nên.thay.bằng.dấu.chấm.nhá,thông.cảm)
TH
23 tháng 5 2021
1. will visit - will give - will become - will speak - will sell - will wait - Will you leave - does she live - will you live - will you meet - wait - Is your sister sick? - Does he usually meet - teaches - takes
TH
23 tháng 5 2021
16. Will you tell - don't come - does your family - will visit
1. had finished - went
2. had seen - left
3. were - had left - arrived
4. came - had started
5. had flown - were
6. Had he driven - happened
7. had come - left
8. had done - went
9. had she lived - moved
10. did - had learnt
11. had said - got
12. had waited - gave
13. Were your sister sick after she had eaten that cake?
DT
Đỗ Thanh Hải
CTVVIP
25 tháng 5 2021
So sánh hơn
1 taller
2 younger
3 more
4 father
5 harder
6 worse - cheaper
7 fewer
8 better
9 more
10 taller than
Tính từ dàu
1 better
2 more difficult
3 more intelligent
4 more dangerous
5 more popular
6 more beautiful
7 more difficult
8 more pleasant
9 more popular
10 more interesting
DT
Đỗ Thanh Hải
CTVVIP
25 tháng 5 2021
So sánh bằng
1 as tall as
2 not as intelligent as
3 as good as
4 as large as
5 as hot as
6 as fast as
7 as young á
8 as easy as
9 as addictive as
10 as well as
So sánh kém
1 less expensive than
2 less intelligent than
3 less milk
4 less difficult
5 less interesting
4 tháng 12 2021
A= tan^2 a + cot^2 a. =(tan a-cot a)^2 +2tan a.cot a =3^2 + 2 = 11
22 tháng 9 2021
Ta có:(x-2y).(x2+2xy+4y2)-(x+y).(x2-xy-y2)
=x3-2x2y+2x2y+4xy2-8y3-x3-x2y+x2y+xy2+xy2
=6xy2-7y3.
a: \(P=\dfrac{x\sqrt{2}-\sqrt{x}+\sqrt{2x}-1+2x+\sqrt{2x}+x\sqrt{2}+\sqrt{x}-2x+1}{2x-1}:B\)
\(=\dfrac{2x\sqrt{2}+2\sqrt{2x}}{2x-1}:\dfrac{2x-1+x\sqrt{2}-\sqrt{x}+\sqrt{2x}-1-2x-\sqrt{2x}-x\sqrt{2}-\sqrt{x}}{2x-1}\)
\(=\dfrac{2\sqrt{2x}\left(\sqrt{x}+1\right)}{2x-1}\cdot\dfrac{2x-1}{-2-2\sqrt{x}}\)
\(=\dfrac{2\sqrt{2x}\left(\sqrt{x}+1\right)}{-2\left(\sqrt{x}+1\right)}=-\sqrt{2x}\)
b: Khi x=1/2(3+2căn2) thì \(P=-\sqrt{2\cdot\dfrac{1}{2}\left(3+2\sqrt{2}\right)}=-\sqrt{2}-1\)