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hog987321
2 năm trước
Hãy chứng minh biểu thức sau luôn luôn lớn hơn 0 với mọi x: $2x - 2 + \frac{12x ^ 2 - 32x + 16}{ \sqrt{4x ^ 3 - 16x ^ 2 + 16x} } + \frac{4x - 4}{ \sqrt{4x ^ 2 - 8x } } $
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Các câu hỏi liên quan

Bài 1: sắp xếp các từ theo đúng thứ tự để tạo thành các câu có ý nghĩa a) house / is / the market / far / to / from / how / it/ Trang's? b) lives / street / grandparents / he / Hoang Quoc Viet / his / on / with. c) many / old / students / my / have / doesn't / class. d) Mrs. / the boy / to / who / Quyen / talking /í? e) smaller / new / old / her / Hoa's / one / school / is / than. f) goes / bus / Hoang / day / work / Mr. / every/ to / by. g) new / from/ one / is / house / is / how / different / Minh's / old? h) because / parents / is /she/ Nguyet / misses / unhappy / her. i) friend / town / lot / does / her / Nhung / of / in /a /have? j) lunch / o'clock / going / it's / and / the / twelve / we're / to /room. Bài 2: điền những từ này vào chỗ trống của đoạn văn sau: Từ: Any, Go , Far , Still , New , With , Miss , A lot of My name is Nguyen Minh Trung. I am a(1)............student in class 7A. I am from Da Nang and my family(2)..............live there. In Ho Chi Minh city , i live (3).............my grandparents at 21/3B Nguyen Trai street. My new school is not (4)..................from our house - about one kilometer, so I (5)..............to school by bike. There are (6)............students in my new school . But I don't have (7) ..............friends. I am unhappy. I (8)..................my parents, my sisters and my friends in Da Nang Làm giúp mình với mình cần gấp. Mình sẽ cho ctlhn nhé. Cảm ơn mọi người

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