Đáp án + Giải thích các bước giải:
`A=((1)/(x-\sqrt{x})+(1)/(\sqrt{x}-1)):(\sqrt{x}+1)/((\sqrt{x}-1)^{2})`
`=((1)/(\sqrt{x}(\sqrt{x}-1))+(1)/(\sqrt{x}-1)).((\sqrt{x}-1)^{2})/(\sqrt{x}+1)`
`=(1+\sqrt{x})/(\sqrt{x}(\sqrt{x}-1)).((\sqrt{x}-1)^{2})/(\sqrt{x}+1)`
`=(\sqrt{x}-1)/(\sqrt{x})`
Đáp án:
`A=(sqrtx-1)/sqrtx`
Giải thích các bước giải:
`A=(1/(x-sqrtx)+1/(sqrtx-1)):(sqrtx+1)/(sqrtx-1)^2(x>0,x ne 1)`
`A=(1/(sqrtx(sqrtx-1))+sqrtx/(sqrtx(sqrtx-1)))*(sqrtx-1)^2/(sqrtx+1)`
`A=(sqrtx+1)/(sqrtx(sqrtx-1))*(sqrtx-1)^2/(sqrtx+1)`
HELPPPPPPPP Chứng minh rằng với a, b, c > 0 thì a^2/b+b^2/c+c^2/a > hoặc = a+b+c
he ( study ) english now he often ...( read ) books She ...( cook ) meAl now He is ...( sleep ) now
Hiệu của hai số tự nhiên là 2812. Tìm hai số đó, biết rằng nếu xóa chữ số 3 ở hàng đơn vị của số lớn thì được số nhỏ.
combine these sentences with who,whom,which -> 1.Who is the woman? We met her here last year -> 2.The office is on the 22nd floor.I work in that office -> 3.The children were playing football. I saw them at the park -> 4.The meeting was interesting.I went do it -> 5.The man were very kind. I talked to him yesterday -> 6.the book was good.I read it yesterday -> 7.The people were very nice.We visited them 2 days ago ->
vt calli (yêu em) màu đỏ nhanh nha
11. Use the correct kind of comparison form of adjectives and adverbs: 1. Your house is than my house. (big) 2. These books are…………… than those books. (thick) 3. Hoi An Ancient Town is the ……………town in Vietnam. (old) 4. The Great Wall of China is the world’s structure. (long) 5. Nam is (tall) than Ba. He is boy in class 6A. (tall) 6. This girl is than that girl. (clever) 7. Mary is as her sister. (pretty) 8. The Nile River is the river in the world. (long) 9. A new house is than an old one. (expensive) 10. We’ve had………….. difficulty with this part than that one. (little) 11. His English is ……………of these students. (good) 12. Mount Everest is mountain in the world. (high) 13. Travelling by air or car, which is ? (interesting) 14. It’s too noisy here. Can we go somewhere ? (quiet) 15. Hanoi is than Ho Chi Minh City. (small) 16. PETRONAS Twins Towers are than Sears Towers. (tall) 17. Thanks to the progress of science, our life is becoming and (good) 18. In order to get good marks, we have to do practice. (far) 19. John is much than I thought. (strong) 20. Mr. Kelly is man in that organization. Nobody is as famous as him . (popular)
Her English is ....than English my ( good ) Winter is .....season in the year ( cold )
Mng ơi vẽ among us hay chibi hay mầm đều được đẹp nha không cần kí tên nha.
Hỗn hợp khí A gồm co và không khí (1/5 Vo2,4/5 V n2) có tỉ khối với khí H2 là 14,24.Tính thành phần trăm theo V mỗi khí trong hỗn hợp
Hiệu của hai số tự nhiên là 603. Nếu xóa hữ số 0 ở hàng đơn vị số lớn thì được số nhỏ. Tìm hai số đó.
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