Đáp án:
Đáp án `B`
Giải thích các bước giải:
`y/x . sqrt { x^2/y^4 }`
`= y/x . sqrt { x^2 }/sqrt { y^4 }`
`= y/x . |x|/|y^2|`
`= y/x . x/y^2` ( vì `x > 0 ; y^2 >=0` với mọi y )`
`= 1/y`
`= -1/y` ( vì `y < 0` )
`=>` Đáp án `B`
$\dfrac{y}{x}.\sqrt{\dfrac{x^2}{y^4}}$
$=\dfrac{y}{x}.\dfrac{|x|}{y^2}$
$=\dfrac{1}{x}.\dfrac{x}{y}$ ( Vì $x > 0$ )
$=\dfrac{1}{y}$
$=\dfrac{-1}{y}$ ( Vì $y < 0$ )
Vậy chọn đáp án $B$
Giúp mình ý b,c,d Giúp mình nhanh nha 🥺
Giúp tui nhanh nha . Tìm từ khác s vs es
V. Supply "for" or "since" in the sentences 1. Tom's lived here __________ 10 years. 2. Have you waited for me _________ yesterday? 3. The boy has played the game __________ 3 pm. 4. I haven't seen her _________ a month. 5. They have kept in touch __________ they left school. 6. I haven't known about that __________ a long time. 7. Dad's worked this office __________1990 8. Peter has married ___________ half a month 9. We have finished the test __________ three hours. 10. Children have learned English __________ they were young Giúp Mình Nhé
vẽ chi bi hay đậu mầm cũng đc NL: lm sao để gửi link trang cá nhân vậy ak
Question 1. Give the correct form of verb. 1. Tonight, we (not/go)_________________ to our teacher’s wedding party. Question 2. Use the correct form of the words give to finish the sentences. 1. Saucepans are sold in the (HOUSE) _______________ goods department. 2. I'm really happy as all of my new neighbours are very (FRIEND)_______________ 3. People often find (HAPPY) _______________in simple things. 4. Kay has got a great (PERSON) _______________You'll really like her. 5. You will need a lot of (STRONG) _______________ to lift this heavy cupboard by yourself. 6. Today is an awful day for me. It is the (BAD) _______________ day of the year. 7. They believe that playing games for too long can be (HARM)______________to their children's health. 8. There is a saying in English: "(ACT) ________________ speak louder than words". 9. My grandmother is a light (SLEEP) ___________.The (SLIGHT) __________ noise can wake her up. Thank you very much!!!
Hãy viết 1 một bài thơ hay nói về cô giáo
Cali : Google nói quá chuẩn NL : Ko tin mấy pác lên google tra xem,hay lắm, hiện ra toàn Rách. Haha
có ai biết tính theo phương trình bằng cách bảo toàn nguyên tố không ạ, chỉ em với
tìm điều kiện để biểu thức nghĩa tức tìm điều kiện để biểu thức tồn tại phải ko ae
Giúp mình với ạ càng nhanh càng tốt 5 h mình nộp bài rồi
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