1 generosity distinguish

2 occurrence

3 unpredictable

4 decorating

5 freedom

6 warning

7 acquaintances

8 trustworthy

9 feeling

10 heroine 

11 effectively

12 respiratory

13 unpolluted

14 considered

15 inexistent

16 idenftified

18 destroyed

19 extensively

20 poisonous 

21 preservation

22 alive

23 Additionally

24 inexperient

25 choice

26 respondence

27 necessities

28 alternative

29 flights

30 econimics

31 indepenent

1. generosity distinguished
2. occurrence
3. unpredictable
4. decorating
5. freedom
6. warnings.
7. acquaintances.
8. trustful
9. feelings
10. heroin.
11. efficiently.
12. respiring
13. unpolluted
14. considered
15. inexistent.
16.unidentified
18. destroyed.
19. extensively
20.poisonous.
21. preservatives.
22. alive
23. Additionally,
24. inexperienced
25. choices
26.response
27. necessities
28. alternative
29. flights
30. Economics
31. independent

a) Điện trở tương đương của đoạn mạch :

\(R_{tđ}=\dfrac{R_1.R_2}{R_1+R_2}=\dfrac{60.40}{60+40}=24\left(\Omega\right)\)

b) Hiệu điện thế giữa hai đầu đoạn mạch :

\(U=I.R_{tđ}=2.24=48\left(V\right)\)

⇒ \(U=U_1=U_2=48\left(V\right)\) (vì R₁ // R₂)

Cường độ dòng điện chạy qua mỗi điện trở :

\(I_1=\dfrac{U_1}{R_1}=\dfrac{48}{60}=0,8\left(A\right)\)

\(I_2=\dfrac{U_2}{R_2}=\dfrac{48}{40}=1,2\left(A\right)\)

 Chúc bạn học tốt

1. charity

2. charitable

3. charitably

4. acquaintances

5. acquainted

6. congratulatory

7. considerate

8. consideration

9. inconsiderately

10. celebrate

11. celebration

12. celebrities

13. description

14. generously

15. generosity

16. distinguished

17. joyfully

18. nominations

19. slave

20. priority

16, a

17, a

18, d

19, a

20, b

21, c

17 B: (động vật hoang dã)

19 A:(khí hậu mưa)

20 B(bị động và expect+to-v)

21 C(động lực)

16 A

17 A

17 D

19 A

20 B

21 C

1.she spends 20 minutes to draw a picture

2.Lan is the most creative in the group

3.No one is smaller than him

4.My pen isn't the same than mine

5.Lan is jealous than her

6.My brother no longer raise pets

-chúc bạn thật thông minh!!!!

6:

\(2^{225}=\left(2^3\right)^{75}=8^{75}\)

\(3^{150}=\left(3^2\right)^{75}=9^{75}\)

mà 8<9

nên \(2^{225}< 3^{150}\)

4: \(\left|5x+3\right|>=0\forall x\)

=>\(-\left|5x+3\right|< =0\forall x\)

=>\(-\left|5x+3\right|+5< =5\forall x\)

Dấu = xảy ra khi 5x+3=0

=>x=-3/5

1:

\(\left(2x+1\right)^4>=0\)

=>\(\left(2x+1\right)^4+2>=2\)

=>\(M=\dfrac{3}{\left(2x+1\right)^4+2}< =\dfrac{3}{2}\)

Dấu = xảy ra khi 2x+1=0

=>x=-1/2