Khó quá giúp mik vs ạ!!
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Khách
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Những câu hỏi liên quan
NV
Nguyễn Việt Lâm
Giáo viên
10 tháng 9 2021
\(2\overrightarrow{MA}+\overrightarrow{BM}+\overrightarrow{MC}=k.\overrightarrow{BC}\Leftrightarrow2\overrightarrow{MA}+\overrightarrow{BC}=k.\overrightarrow{BC}\)
\(\Leftrightarrow2\overrightarrow{MA}=\left(k-1\right)\overrightarrow{BC}\)
\(\Leftrightarrow\overrightarrow{MA}=\left(\dfrac{k-1}{2}\right)\overrightarrow{BC}\)
\(\Leftrightarrow\overrightarrow{MA}\) cùng phương \(\overrightarrow{BC}\)
\(\Rightarrow\) Tập hợp M là đường thẳng qua A và song song BC
LT
3
DA
6 tháng 12 2021
Mẹ là tia nắng
Cho con hi vọng
Mẹ là bình minh
Sưởi ấm lòng con
Mẹ làm tất cả
Chỉ mong cho con
Có một tương lai
Tươi sáng ngời ngời.
đây nhé
NT
1
23 tháng 10 2023
a: gọi d=ƯCLN(n+4;n+5)
=>\(\left\{{}\begin{matrix}n+5⋮d\\n+4⋮d\end{matrix}\right.\)
=>\(n+5-n-4⋮d\)
=>\(1⋮d\)
=>d=1
b: gọi d=ƯCLN(2n+3;2n+1)
=>\(\left\{{}\begin{matrix}2n+3⋮d\\2n+1⋮d\end{matrix}\right.\)
=>\(2n+3-2n-1⋮d\)
=>\(2⋮d\)
mà 2n+3 lẻ
nên d=1
Tham khảo nhe =))
Dùng những từ gợi ý sau để viết các câu hoàn chỉnh.
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==>I received a letter from my uncle last week.
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==>Yesterday,the doctor told Hoa not to forget to brush her teeth everyday.
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==>I told my classmates about my trip in Tri Nguyen Aquarium in Nha Trang.
4.Yesterday/ I/ toothache/ so/ I/ go/see/ dentist
==>Yesterday I had a tooache so I went to see the dentist.
5. Dentist/ check/his teeth/ and/ tell/ him/not/ worry.
==>Dentist checked his teeth and told him no to worry.
6. She/ always/ get up/ early/ do morning exercises.
==>She always gets up early to do morning exercises.
7. Yesterday/ Minh/ feel/ less/ scared/ after/ Dr. Lai/ check/ his teeth.
==>Yesterday Minh felt less scared after Dr.lai checked his teeth.
8. Tam/ look/ tired/ because/ she/ stay/ late/ last night.
==>Tom looked tired because she stayed late last night.
1. I/ receive/ letter/ uncle/ last week
=>I received a letter from my uncle last week.
2. yesterday/ doctor/ tell/ Hoa/ not/ forget/ brush/ teeth/ every day.
=>Yesterday,the doctor told Hoa not to forget to brush her teeth everyday.
3. I/ tell/ classmates/ my trip/ Tri Nguyen Aquarium/ Nha Trang.
=>I told my classmates about my trip in Tri Nguyen Aquarium in Nha Trang.
4.Yesterday/ I/ toothache/ so/ I/ go/see/ dentist
=>Yesterday I had a tooache so I went to see the dentist.
5. Dentist/ check/his teeth/ and/ tell/ him/not/ worry.
=>Dentist checked his teeth and told him no to worry.
6. She/ always/ get up/ early/ do morning exercises.
=>She always gets up early to do morning exercises.
7. Yesterday/ Minh/ feel/ less/ scared/ after/ Dr. Lai/ check/ his teeth.
=>Yesterday Minh felt less scared after Dr.lai checked his teeth.
8. Tam/ look/ tired/ because/ she/ stay/ late/ last night.
=>Tom looked tired because she stayed late last night.