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DT
Đỗ Thanh Hải
CTVVIP
31 tháng 8 2021
1 haven't cleaned
2 will be
3 is sleeping - gets
4 is teaching
5 does - isn't going - is watching
6 have written
7 hadn't disturbed
8 have you worked
9 get - get
6 studies - are trying
7 had stood
8 drove
9 have you studied
10 have waited - hasn't come
11 have lived
HP
17 tháng 9 2021
a. \(\sqrt{\left(2+\sqrt{7}\right)^2}=2+\sqrt{7}=2\dfrac{\sqrt{7}}{1}\)
c. \(5\sqrt{x^2-6x+9}=5\sqrt{\left(x-3\right)^2}=5\left(x-3\right)=5x-15\)
d. \(\sqrt{\left(2-\sqrt{5}\right)^2}+\sqrt{\left(\sqrt{5}-7\right)^2}=2-\sqrt{5}+\sqrt{5}-7=-5\)
17 tháng 9 2021
a) \(\sqrt{\left(2+\sqrt{7}\right)^2}=\left|2+\sqrt{7}\right|=2+\sqrt{7}\)
b) \(\sqrt{4+2\sqrt{3}}=\sqrt{\left(\sqrt{3}+1\right)^2}=\sqrt{3}+1\)
c) \(5\sqrt{x^2-6x+9}=5\sqrt{\left(x-3\right)^2}=5\left|x-3\right|=5\left(3-x\right)=15-5x\)(do x<3)
d) \(\sqrt{\left(2-\sqrt{5}\right)^2}+\sqrt{\left(\sqrt{5}-7\right)^2}=2-\sqrt{5}+\sqrt{5}-7=-5\)
6 tháng 1 2022
Bài 1:
a: \(150_{10}=\text{10010110}_2\)
b: \(11001110_2=206_2\)
c: \(7E_{16}=126_{10}\)
DT
15 tháng 9 2021
1. seeing
2. working
3. to meet
4. talking/ to finish
5. asking
6. not to speak
7. carrying
8. overhearing
9. writing/ waiting
10. to avoid/ being
11. giving/ to speak
12. going/ saying
13. to persuade/ to agree
14. sneezing/ sitting
15. driving/ being
16. to start/ looking
17. to show/ to use
18. making/ to do
19. remaining/ to help/ to stay
20. listening/ hearing
21. camping
22. to be
23. to speak
24. to pay
25. to meet
26. not trying/ to solve
27. being
28. hunting
29. to be
30. working
31. going
32. to do
33. to bring
34. working
35. to buy
36. to inform
37. studying
38. to buy
39. to be fed
40. working
bằng 13