mầu vàng tượng trưng cho cái j
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![](https://rs.olm.vn/images/avt/0.png?1311)
a,=101490
b,=1 nha
HT
chúc bn năm mới vui vẻ
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TL:
A) 62385 + 237 x 165
= 62385 + 39105
= 101490
B) 132039 - 1234 x 107
= 132039 - 132038
= 1
HT.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Answer:
a/ Write the sentences using the words given.
1. My house / be / wide / than / it / use to.
\(\rightarrow\) My house is wider than it used to.
2. My parents / not / use to / look after / careful / when / be / highschool.
\(\rightarrow\)My parents did not use to be looked after careful when they were at highschool.
3. Jack / use to / play / marble / when / be / child?
\(\rightarrow\)Did Jack use to play marble when he was a child?
4. How far / it / from / house / near / cinema?
\(\rightarrow\)How far is it from your house the the nearest cinema?
5. It / not / far / house / Temple of Literature.
\(\rightarrow\)It is not far from my house to the Temple of Literature.
b/ Rewrite the sentences using the cues given.
1. Her mother lived in Hue before she moved to Hanoi. (used to)
\(\rightarrow\)Her mother used to live in Hue before she moved to Hanoi.
2. My father no longer smokes.
\(\rightarrow\)My father used to smoke.
3. John isn’t allowed to play online games anymore.
\(\rightarrow\)John used to play online games.
4. There are the flight routes straight from Vietnam to The US and Germany now.
\(\rightarrow\)There did not use to be the flights route straight from Vietnam to the US and Germany now.
5. Our children give up eating junk food.
\(\rightarrow\)Our children used to eat junk food.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{4}{3}\times4\times3\times\frac{4}{3}=\frac{4\times4\times3\times4}{3\times3}=\frac{64}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Trả lời:
ĐK:\(n\in N\)
\(3n+1\)\(⋮\)\(n+2\)
\(\Rightarrow3(n+2)-5\)\(⋮\)\(n+2\)
Mà \(3(n+2)\)\(⋮\)\(n+2\)
\(\Rightarrow\)\(5\)\(⋮\)\(n+2\)
\(\Rightarrow n+2\in\left\{1;5;-1;-5\right\}\)
\(\Rightarrow n\in\left\{-1;3;-3;-7\right\}\)
Mà \(n\in N\)
\(\Rightarrow n=3\)
Vậy \(n=3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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