Các bạn làm hộ mình nha.............

Cho A=(1-2x/2x)+(2x/2x-1)+(1/2x-4x^2) Tìm ĐKXĐ và rút gọn

She failed her exam; .... , she had to do it again

Tìm GTNN A=(x ²+5x+5)((x+3)(x+2)+1) B=(x-1)(x-3)(x ²-4x+5) C=2x ²+2xy+y ²-2x+10y+5

•Tìm cơ sở $a$ trong $D[ ]$ ứng với hạ luỹ tịnh tiến $n>>0$ sau: $a)D[a]=\frac{9}{8}$ $b)D[a^2-2a+1]=\frac{1}{4}$ $c)D^{T}[\frac{x+3}{2x+1}]=\frac{1}{8}$ $d)D^{-1}[2^a+1]=\frac{1}{33}$ $e)D^T[a]=D^{-1}[a]$

Cho x-y =2. Tìm GTNN của A=xy +4

Hãy chọn các cặp chất sau đây: H2SO4đ, P2O5, CaO, KOH rắn, CuSO4 khan để làm khô 1 trong các khí NH3, O2, CO, CO2, CL2, hỗn hợp CO2, NH3. Giải thích?

mọi người viết giúp mình 1 tác phẩm về cuộc thi viết vẽ tuổi học trò dưới đây là thể lệ cuộc thi, mọi người giúp mình nhé, ai giúp mình mình sẽ cho 40 điểm

Bài 1: Tìm GTLN A=-2x ²+0,5x-8 B=-x ²+2xy-4y ²+2x+10y+5

Bài 4: Tìm lỗi sai 1. Yesterday I meet Mr. Tan at the supermarket. He bought some cloths for the festival this morning 2. My best friend get the accident last night. He is staying at home now. 3. I often went to the library to borrow books on weekend. 4. Look! A horse runs on the street 5. He already finishes his homework. 6. My brother asks me to pick up him at the dormitory 3 hours ago 7. Where is Tony, Jane? He taking some photographs in the garden! 8. The earth was a planet. 9. We miss the bus. Now we'll have to walk. 10. Why didn’t Tom went to school this morning? Because he was sick Bài 5: Viết lại câu 1. often/ I/ the/ museum/ Saturday/ visit/ on 2. 3 years/ my / died/ ago/ neighbor/ because/ accident/ got /an 3. cooking/ sister/ in/ my/ is/ dinner/ kitchen/the 4. do not/ Jane/ usually/ breakfast/ morning/ in the/ have. 5. tired/ I/ when/ cycle/ to/ school/ am/ always/I 6. reused/ recycle/ we/ bottles/ can? 7. Anything/ She/ here/ has been/ never/ she/ but/ buys/ several times/ in. 8. Ever/ you/ been/ Australia/ have/ in? Bài 6 : Chia động từ trong ngoặc cho phù hợp 1. I ( meet ) ………….. her at the movie theater last night. 2. My mother ( make ) …………………….…………. a dress now. 3. Two years ago, she ( teach ) …………………………. at a village school. 4. What ……………………… you (do) ………………….. yesterday morning? 5. We (not travel ) ……………………………… to Hue next month. 6. She never ( stay ) ………….. up late at night. 7. My mother ( plant ) ………………………. flowers in the garden at the moment. 8. Why ……………. you ( leave) …………….. the party early last night? 9. ……….. Minh ( go ) ………………… to the dentist tomorrow morning? 10. Michael ( play) ………………. the piano since he ( be ) ……………… three.