Chia động từ ở thì quá đơn :

1. There ( be ) .....was........only one book on the table this morning .

2. There ( be ).....was..... nothing in the fridge yesterday.

\(A=\left(1-\dfrac{1}{2}\right)+\left(1-\dfrac{1}{4}\right)+\left(1-\dfrac{1}{8}\right)+.......................+\left(1-\dfrac{1}{1024}\right)\)

\(\Leftrightarrow A=\dfrac{1}{2}+\dfrac{3}{4}+\dfrac{7}{8}+..................+\dfrac{1023}{1024}\)

\(\Leftrightarrow A=\dfrac{1}{2}+\dfrac{3}{2^2}+\dfrac{7}{2^3}+...............+\dfrac{1023}{2^{10}}\)

\(\Leftrightarrow2A=1+\dfrac{3}{2}+\dfrac{7}{2^2}+...............+\dfrac{1023}{2^9}\)

\(\Leftrightarrow2A-A=\left(1+\dfrac{3}{2}+\dfrac{7}{2^2}+............+\dfrac{1023}{2^9}\right)-\left(\dfrac{1}{2}+\dfrac{3}{2^2}+\dfrac{7}{2^3}+...............+\dfrac{1023}{2^{10}}\right)\)\(\Leftrightarrow A=1+\left(\dfrac{3}{2}-\dfrac{1}{2}\right)+\left(\dfrac{7}{2^2}-\dfrac{3}{2^2}\right)+.................+\left(\dfrac{1023}{2^9}-\dfrac{511}{2^9}\right)-\dfrac{1023}{2^{10}}\)\(\Leftrightarrow A=\left(1+1+...+1\right)-\dfrac{1023}{2^{10}}\)

\(\Leftrightarrow A=9-\dfrac{1023}{2^{10}}\)

hãy chia động từ trong ngoặc ở thì hiện tại tiếp diễn

1. Mrs Nhung (ride) ......is riding..... her bike to work

2. You (wait) .....Are - waiting........ for our teacher?

3. I (play) .....am playing.... video games and my sister (watch) ....watching....... TV

4. She (not travel) .......is not traveling......... to the hospital by bus but she (drive) ...is driving.........

5. We (sit) .....are siting........ in the livingroom

6. What the farmers (do) ....are - doing......?

- They (unload) ........are unload...... the vegetables

7. Where he (fly) ......is - flying.......? - To Ho Chi Minh City

8. I ( eat)........am eating............ my breakfast at a food stall

1.What is your name?

..........My name is Hang...........................

2.When were you born?

.............I were born in 2005........................

3. What are you doing now?

............I am sleeping................................

4. How often do you play sports?

....................sometimes..................................

5. Do you often go to the zoo?

....................No...........................

6. Where were you yesterday?

................i was at school................................

7. Are you speaking English now?

....................No..................................

8. What is your favourite subject?

..................Maths....................................

9. When do you have vietnamese?

...............Everyday...............................

10.What is the name of your school?

..................An Khe secondary school...................................

11. When do you go to school?

....................everyday...........................

12. Are you Australian?

.................No....................

13. What do you usually do aften school?

..................I often do my homework.................................................

14. Do you often go to the market with your mother?

...........................Yes......................................................

15. Can you swim?

.............No................

16. Do you like watching TV in your free time?

...................Yes.........................................................

17. What do you want to be in the future?

....................I want to be a lawyer.............................................

18. What did you do last weekend?

.................I went to the park.......................................

19. What sports do you like the most?

.......basketball................

20. What do you often have for breakfast?

..................milk.......

a) \(\left(1\dfrac{1}{2}\right)\left(1\dfrac{1}{3}\right)..............\left(1\dfrac{1}{100}\right)\)

\(=\dfrac{3}{2}.\dfrac{4}{3}....................\dfrac{101}{100}\)

\(=\dfrac{1}{2}.\dfrac{101}{1}=\dfrac{101}{2}\)

b) \(1\dfrac{1}{2}.1\dfrac{1}{3}.1\dfrac{1}{4}...................1\dfrac{1}{2007}\)

\(=\dfrac{3}{2}.\dfrac{4}{3}.\dfrac{5}{4}....................\dfrac{2008}{2007}\)

\(=\dfrac{1}{2}.\dfrac{2008}{1}=1004\)

c) \(1\dfrac{1}{2}.1\dfrac{1}{3}.....................1\dfrac{1}{2017}\)

\(=\dfrac{3}{2}.\dfrac{4}{3}..................\dfrac{2018}{2017}\)

\(=\dfrac{1}{2}.\dfrac{2018}{1}=1009\)

\(P=1+5^3+5^6+5^9+..................+5^{99}\)

\(\Leftrightarrow5^3P=125P=5^3+5^6+................+5^{99}+5^{102}\)

\(\Leftrightarrow125P-P=\left(5^3+5^6+...........+5^{102}\right)-\left(1+5^3+.........+5^{99}\right)\)

\(\Leftrightarrow124P=5^{102}-1\)

\(\Leftrightarrow P=\dfrac{5^{102}-1}{24}\)

1. Chia động từ ở thì hiện tại đơn và hiện tại tiếp diễn

a.Nam isn't in his room.He (play)......is playing..... in the garder now.

b.I (go) ...go.....to school by bus every morning

c.Look!The girls (play)....is playing....the piano

d.We (do)....are doing....the homework at the moment

e.Mai(have)....has.... lunch at home every day,but now she (have) ...is havig.....her lunch in a small restaurant

g.I(listen)...am listening.....to the music now

h.Mr.Tam (travel) ....travels...to in Ha Noi every month .He (travel) ...is travel....to Ha Noi at present

i.Mr.Nhan (go) ...goes....to work by car

k.She (watch)...is watching.....television nowl.Linda(eat) ..is eating....dinner right now

Chú ý: các bạn hãy điền những từ có trong ngoặc đơn điền vào chỗ--- giúp mk nha