91. My parents insist me on learning something interesting.
My parents wants ……………………………………………
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Đáp án: A
Giải thích: cấu trúc “want sb to V”: muốn ai làm gì
Dịch: Bố mẹ muốn tôi học tiếng Tây Ban Nha.
Đáp án A
Giải thích: cấu trúc “want sb to V”: muốn ai làm gì
Dịch: Bố mẹ muốn tôi học tiếng Tây Ban Nha.
1. playing beach games is very interesting .
=>It is........very interesting to play beach games..........
2. It not a good idea to spend too much time on computer games.
=>It's better to avoid......spending to much time on computer games......
3. My patents insist me on learning sonething interesting .
=>My parents wants ...me to learn something interesting.......
1. playing beach games is very interesting .
=>It is very interesting to play beach games
2. It not a good idea to spend too much time on computer games.
=>It's better to avoid spending too much time on computer games
3. My patents insist me on learning something interesting .
=>My parents wants to me learn something interesting
Đáp án: A
Giải thích: cấu trúc “want sb to V”: muốn ai làm gì
Dịch: Bố mẹ muốn tôi học tiếng Tây Ban Nha.
Rewrite the sentences
1. Vinh really loves to hang out with friends.
Vinh really enjoys hanging out with friends.
2. Playing beach games is very interesting.
It is very interesting to play beach games
3. It is not a good idea to spend too much time on computer games.
It's better to avoid spending too much time on computer games.
4. My parent insist me on learning something interesting.
My parents wants me to learn something interesting.
5. Jenny finds reading poetry boring.
Jenny dislike reading poetry
Ex1:
1. It's not a good idea to spend your money on a new phone
-> It's better to avoid spending your money on a new phone
2. Laura didn't want to tell me the secret
-> Laura didn't feel like telling me the secret
3. My parents insist me on learning something interesting.
-> My parents want me to learn something interesting.
4. You don't need to set off early
-> It's not necessary for you to set off early
Ex1:
1. It's not a good idea to spend your money on a new phone
-> It's better to avoid ..spending your money on a new phone..
2. Laura didn't want to tell me the secret
-> Laura didn't feel like .telling me the secret..
3. My parents insist me on learning something interesting.
-> My parents want .me to learn something interesting..
4. You don't need to set off early
-> It's not .neccessarry for you to set off early..
-> My parents want .me not to set off early..
Complete the second sentence so that it has similar meaning to the first sentence
1. Vinh really loves to hang out with friends
Vinh really enjoys _hanging out with friends________
2. Playing beach games is very interesting
It is __very interesting to play beach games _______
3. It is not a good idea to spend too much time on computer games
It's better to avoid ___spending too much time on computer games ________
4. My parents insist me on learning something interesting
My parents wants__me to learn something interesting _____
5. Jenny finds insist reading poetry boring
Jenny dislikes___reading poetry____________
Lời giải:
a. Với $n$ nguyên khác -3, để $B$ nguyên thì:
$2n+9\vdots n+3$
$\Rightarrow 2(n+3)+3\vdots n+3$
$\Rightarrow 3\vdots n+3$
$\Rightarrow n+3\in\left\{\pm 1; \pm 3\right\}$
$\Rightarrow n\in\left\{-2; -4; 0; -6\right\}$
b.
$B=\frac{2n+9}{n+3}=\frac{2(n+3)+3}{n+3}=2+\frac{3}{n+3}$
Để $B_{\max}$ thì $\frac{3}{n+3}$ max
Điều này đạt được khi $n+3$ là số nguyên dương nhỏ nhất
Tức là $n+3=1$
$\Leftrightarrow n=-2$
c. Để $B$ min thì $\frac{3}{n+3}$ min
Điều này đạt được khi $n+3$ là số nguyên âm lớn nhất
Tức là $n+3=-1$
$\Leftrightarrow n=-4$
n2 + n + 4 chia hết cho n + 1
=> n.n + n + 4 chia hết cho n + 1
=> n(n + 1) + 4 chia hết cho n + 1
Vì n(n + 1) chia hết cho n + 1 nên để n(n + 1) + 4 chia hết cho n + 1 thì 4 chia hết cho n + 1
=> n + 1 thuộc Ư(4)
=> n + 1 thuộc {1;2;4}
Ta có bảng
n + 1 | 1 | 2 | 4 |
n | 0 | 1 | 3 |
Vậy n thuộc {0;1;3}
My parents want me to learn something interesting