`#huy`
`ĐK:x>=1,5`
`a)\sqrt{x-5}=3`
`<=>x-5=9`
`<=>x=14`
`b)\sqrt{x-10}=-2`
Vì `\sqrt{x-10}>=0AAx>=1,5`
Mà `-2<0`
`=>` vô nghiệm
`c)\sqrt{(2x-3)/(x-1)}=2`
`<=>(2x-3)/(x-1)=4`
`<=>2x-3=4(x-1)`
`<=>2x-3=4x-4`
`<=>2x=1`
`<=>x=1/2`
Bạn xem hình ạ
Cảm nhận về 2 câu thơ cuối của bài thơ câu cá mùa thu của Nguyễn Khuyến
Tìm thêm 10 từ để kết hợp vs các từ sau: donte:....... help:...... clean:..... provide:..... Giups mik nha đang cần gấp.....
Hãy viết một đoạn văn NLXH (khoảng 200 chữ) trình bày suy nghĩ của anh/ chị về điều được nói đến trong hai câu thơ: “Quê hương nếu ai không nhớ Sẽ không lớn nỗi thành người”
Cho mạch điện như hình vẽ.Các điện trở R2=5Ω,R1=3R3.Vôn kế 1 chỉ 5V.Vôn kế 2 chỉ 15v.Tính giá trị của R1,R3 các bạn giúp mình với sắp nộp r😥
cuộc gặp gỡ của chú bé hồng với mẹ diễn ra bằng chi tiết nào
Giúp e vs ạ , e đang cần gấp , pls
Ai giải luôn giúp em bài này được không ạ .
PRACTICE: Write sentences. Say what the people are going to do Ex: I feel very tired. (take a day off) => I am going to take a day off. 1. My uncle has won some money. (buy a new car) =>They received a wedding present from their pen pal friend, Nick. (write a letter to thank him) 3. I’ll have an annual holiday next month. (visit Ha Long Bay) 4. My father has a bad cough. (stop smoking) 5. Linh is studying medicine. (be a doctor) 6. We have bought some bricks. (build a garage) => 7. The windows are dirty and Mai’ll be free this afternoon. (clean the windows) 8. Jane and Lan have decided to have a party. (invite lots of people) 2 Adverbs of place:/page 26 Outside( bên ngoài ) , inside(bên trong ), there, here, upstairs(tầng trên ), downstairs ( tầng dưới ) Exercises 2/page 26 a. upstairs b. ………c…………d…………..e………….f………… Choose the most suitable word or phrase to complete each of the following sentences: 1. Deaf-mute can ________ speak ________ hear. A. both – and B. not only – but also C. neither – nor D. either – or 2. Alexander Graham Bell was born ________ March 3, 1847. A.in B. on C. at D. duringThey ________ from Canada to America to find work. A. left B. immigrated C. came D. emigrate 4. Would you like ________ a message. A. to leave B. leave C. leaving D. left 5. She came ________ with a new idea for increasing sale. A. on B. up C. in D. over 6. You can use a(n) ________ to record messages when you are out. A. telephone directory B. mobile phone C. fax machine D. answering machine 7. Don’t come in. Please wait ________ for your turn. A. inside B. downstairs C. outside D. upstairs 8. I ________ a quick phone call. Can you wait for me? A. make B. am going to make C. will make D. made 9. The match was ________ live all over the world. A. traveled B. demonstrated C. transmitted D. arranged 10. You can see a lot of famous paintings in this ________. A. service B. invention C. demonstration D. exhibition II/Supply the correct word form : 1.I’ll make ___________________ for the meeting tonight. (arrange) 2. Ho Chi Minh City is an important ____________________ center. ( commerce) 3. Michael Faraday made a lot of ________________in the field of electricity. ( invent) 4. There was an ___________________of painting at the Art Gallery. ( exhibit) 5. This old man is __________________ in one ear. ( deafen) 6. Thomas Watson was Bell’s ________________________, wasn’t he? ( assist) 7.He was ___________________in demonstrating in his invention. (success) 8.Bell experimented with ways of transmitting ____________ over the long distance (speak) 9.Bell demonstrated his inventions at a lot of __________________ ( exhibit) 10. Telephone was _______________ by Alexander Bell in 1876 ( inventor) III. Fill in the blanks with a suitable preposition: 1. The post office is not far ________ my house. 2. Let’s meet ________ the City Theater ________ 7 o’clock. 3.She was born ________ May 16th, 2001 ________ England. 4. He worked ________ deaf-mutes ________ Boston University. 5.Mrs. Lien said you could reach her ________ 8603 423. 6. Snow is falling all ________ the country. 7. The secretary took a massage ________ her boss. He emigrated ________ Canada ________ 1870s. IV/ Rewrite the following sentences without changing their meanings: 1.Peter is not old . He can’t see the horror film. → Peter is not ____________________________________ 2. The theater is very far . We can’t go to on time → The theater isn’t_____________________________ 3.Alexander G. Bell invented the telephone. → Alexander was _______________________________ 4.Hien's friend invited her to his birthday party. => She___________________________. birthday present. 5.Her sister is old. She can drive a car. → Her sister is ______________________________________
Làm thế nào để phân biệt kiểu gen AB/ab và Ab/aB
Cầu 4: Em sẽ làm gì để bảo vệ hoa binh cho lớp học của minh? Nếu em có người bạn hay đi bịa đặt, nói xấu gãy mâu thuẫn trong lớp học thì em sẽ làm gi?
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