Lời giải :
`c)1/{\sqrt{3}-\sqrt{2}}+1/{\sqrt{3}+\sqrt{2}}``={\sqrt{3}+\sqrt{2}}/{(\sqrt{3}-\sqrt{2})(\sqrt{3}+\sqrt{2})}+{\sqrt{3}-\sqrt{2}}/{(\sqrt{3}-\sqrt{2})(\sqrt{3}+\sqrt{2})}``={\sqrt{3}+\sqrt{2}+\sqrt{3}-\sqrt{2}}/{3-2}``=2\sqrt{3}`
$\frac{1}{√3-√2}$ + $\frac{1}{√3+√2}$
= $\frac{√3+√2}{(√3-√2)(√3+√2)}$ + $\frac{√3-√2}{(√3-√2)(√3+√2)}$
= $\frac{√3+√2+√3-√2 }{3-2}$
= `2√3`
viết biểu thức dưới dạng tích =cách sử dụng hđt.Giups mik vs ạ cần ngay bh
Tìm `n ∈ N` để `A = (n + 1)^4 + n^4 + 1` là số nguyên tố.
I. Choose the word whose underlined part is pronounced differently from the others. (NHỮNG CHỮ CÁI MÌNH IN HOA Ở PHẦN 1 LÀ PHẦN ÂM CẦN LÀM ĐẤY Ạ) 1. A. hEAlth B. brEAd C. appEAr D. hEAvy 2. A. Sugar B. Since C. Storm D. Symptom 3. A. arrivED B. experiencED C. failED D. discoverED 4. A. pronOUnce B. rOUnd C. sOUnd D. pOUr 5. A. wallS B. rewardS C. stickS D. spectatorS II. Choose the word whose main stress pattern is not the same as that of the others. 1. A. basketball B. wonderful C. education D. trustworthy 2. A. surround B. restrict C. remove D. manual 3. A. planet B. affect C. annoy D. excuse 4. A. famous B. climate C. language D. attend 5. A. extensive B. decorate C. distinguish D. acquaintance KÈM GIẢI THÍCH CHI TIẾT. CẢM ƠN
Tách riêng các khí ra khỏi hỗn họp h2,cl2,co2, viết phương trình.
X. Complete the sentences with and, so, but or because. 1. I didn't feel well ________________ I stayed at home. 2. He liked her ________________ she was happy. 3. I liked Spain ________________ I wanted to go home. 4. She likes swimming ________________ jogging. 5. We were late ________________ there was an accident.
giúp mink vs mọi người ơi cần gấp
helppppppppp thaks Question 2.Supply the correct form of verb in the blankets. 1. Yesterday , I (be)………………………..at home . 2. They (not be )………………………at school last sunday. 3.(he be )…………………….at the party last night ? Yes, he (be )………………… 4. We (be) ……………………in London last week. 5. It (be)……………………sunny yesterday. 6. I and Nam (be)………………………at the cinema yesterday. 7.Last summer, I (visit)…………………Da Lat with my family . 8. Last night , I (do) ……...my homework .Then I (go)…………….to bed. 9. We (be)………………………….single last year. 10. Nam (listen)……………………..to music yesterday . You (go) ...................................to Dalat for last tet vacation. 11. (He have) ...................................a lot of friends in Ho Chi Minh city 3 years ago? 12. His uncle (take).............................him to see Tri Nguyen aquarium last week? 13. Liz (buy)........................... a lot of souvenirs yesterday? 14. They (put) ...........................the fish in the big bag last Sunday? 15. They ( not eat)............................meat in her meals in Vung Tau yesterday. 16. I(wear) ................................the cap with a dolphin om it yesterday. 17. Liz (teach)........................................ Ba some English last week. 18.( Bad and Tan remember) ......................................their trip to Nha Trang last month? 19. (Nam return) ...............................................to Ha Noi last week? 20. Where he (go)........................................ yesterday?
3 CMR a) 35^10-1 chia hết cho 1224 b) 35^10-1 chia hết cho 680 c) 27^10-1 chia hết cho 28,26
II- Fill in PREPOSITION. 1. Vinh is very friendly. He gets …………………… with most of my friends. 2. Last year it took her two months to get …………….…. a terrible cold. 3. Tom is going to turn……………….as a ghost for Halloween 4. My rubber ran ………………….. so quickly. 5. Let's go ………………………that report again before we submit it 6. His career started to take…………………….He could earn a lot of money during that time. 7. What were you doing when the alarm fire went…………………..? 8. The magazine is brought ……………..every two weeks. 9. She deals………………..emails and papers in her work. 10. I can’t believe that I’ve put…………………….5 more kilos. giúp mình với ạ
Giúp e bài này với ạ, mình cho 5saoo:(. mãi iuu <33
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