gups em ạ lẹ ạ thú bảy em nộp rò ạ
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24 tháng 9 2021
https://www.youtube.com/watch?v=rCKalZUpYpE
Xem trướcXem trước 2:59Cách làm mặt nạ hình con thỏ chơi trung thu12 thg 9, 2019
NN
27 tháng 7 2021
48. My brother whose house was broken in called the police.
49. Mary was too very tired to study more.
50.If Emily wasn't sick today, she could go to school.
51.Although my grandparents are very busy, they spend a lot of time taking care of us.
52. The floor hasn't been cleaned yet.
53.We haven't seen our grandfather for five month.
54. I wish I could remember the answers to these questions.
55. I spent three hours cleaning the house yesterday.
TC
27 tháng 7 2021
P8. 48.My brother whose house was broken in called the police.
49. Mary was too tired to study.
50. If Emily wasn't sick today, she could go to school.
51. Although my grandparents are very busy, they spend a lot of time taking care of us.
P9. 52. The floor hasn't been cleaned yet.
53.We haven't seen our grandfaather for five months.
54. I wish I could remember the answer to these questions.
55. I spent three hours cleaning the house yesterday.
3 tháng 12 2021
BTKL: \(a=\Sigma m_{O_2}=m_{hh\text{ oxit}}-m_{hh\text { KL}}=14,2-7,8=6,4(g)\)
2 tháng 12 2021
\(ĐK:\left\{{}\begin{matrix}2-x\ge0\\x-2\ge0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\le2\\x\ge2\end{matrix}\right.\Leftrightarrow x=2\)
Thay \(x=2\Leftrightarrow2=8\left(\text{vô lí}\right)\)
Vậy PT vô nghiệm
Giúp cái j, đâu có bt đâu