(1/1x2)+(1/2x3)+(1/3x4)+(1/4x5)+(1/5x6)
= 1 - $\frac{1}{2}$ + $\frac{1}{2}$ - $\frac{1}{3}$ + $\frac{1}{3}$ - $\frac{1}{4}$ + $\frac{1}{4}$ - $\frac{1}{5}$ + $\frac{1}{5}$ - $\frac{1}{6}$
= 1 - $\frac{1}{6}$
= $\frac{5}{6}$
=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6
=1+(1/2-1/2+1/3-1/3+1/4-1/4+1/5-1/5)-1/6
=1+(0+0+0+0)-1/6
=1-1/6
=5/6
Giúp câu 3.3 với ạ . Chân thành cảm ơn
Tính pH trộn 100ml HCL 1M với 200ml HCL 0,2 M
Giải giúp mình câu C nhé Cảm ơn mọi người
Cho ba mặt phẳng (α), (β), (γ), những mệnh đề nào sau đây đúng? a) Nếu (α) ⊥ (β) và (α) // (γ) thì (β) ⊥ (γ). b) Nếu (α) ⊥ (β) và (α) ⊥ (γ) thì (β) // (γ).
Giải giúp mình câu A và Bê nhé Cảm ơn trước
Bài tập về đại từ phản thân trong tiếng Anh Select the correct word in the boxer below. ________________________________________________ My self - your self - him self - her self it self - your selves - ourselves - them selves _______________________________________________ 1. The cat nearly killed _________________ when it ran across the road. 2. I enjoyed______________ at the party. 3. He alway looks at_________________ in the mirror. 4. We helped________________to the coffee. 5. The woman accidentally hurt_______________with the knife. 6. The children enjoyed _________________at the beach. 7. The two of you shouldn't do that. You'll hurt________________. 8. He pair for____________. 9. Some people only think about_____________. 10. She did tell him. I told him_______________. 11. I went to the supermarket by________________. 12. Harry lives by_____________________. 13. Anna had dinner at the restaurant by_________________. 14. You shouldn't go there by____________. 15. We will build the house by_____________. 16. The dog came home by_______________. 17. They went on a holliday by________________. 18. I don't like eating by_________________. 19. She cooked the dinner all by_______________. 20. Did the two of you do this by_______________. 21. Robert made this T-shirt_______________. 22. Lisa did the homework ___________________. 23. We helped______________to some cola at the party. 24. Emma, did you take the photo by_________________? 25. I wrote this poem__________________. 26. He cut_____________with the knife while he was doing the dishes. 27. The lion can defend_______________. 28. My mother often talks to_______________. 29. Tim and Gerry, if you want more milk, help_________________. _Giải hộ mk vs ạ. Kasamita_
Nêu nội dung của đoạn văn Hồi chưa vào nghề ...cháu buồn đến chết mất(lặng lẽ sapa)
Phân tích đa thức thành nhân tử: 1/ 50x ² - x^4 - 625 2/ x ³ - x^2 - 5x + 125 3/ x ³ + 2x ² - 6x - 27 4/ 12x ³ + 4x ² - 27x - 9 5/ x^4 - 25x ² + 20x + 4 6/ x^4 - 7x ² + 9
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