$T: d\to d'// d$
$\Rightarrow d': 4x-3y+c=0$
Lấy điểm $M(-\dfrac{1}{4};0)\in d$
$\Rightarrow M'(-\dfrac{1}{4}+1;0-4)=(\dfrac{3}{4};-4)$
$M'\in d'\Rightarrow 4.\dfrac{3}{4}+3.4+c=0$
$\Leftrightarrow c=-15$
$\to d': 4x-3y-15=0$
Đáp án:
Giải thích các bước giải:
Lấy `M(-1;-1) \in (d)`
`T_{\vec{v}}: M(x;y)=M'(x';y')`
`⇒ M'(0;-5)`
Vì `(d) //// (d')⇒ (d'): 4x-3y+c=0`
Vì `M' \in (d')` thay vào ta được: `c=-15`
Vậy `(d'):4x-3y-15=0`
Exercise 1: Because of – so - because – since – as 1. ____________ it was dark and rainy, I couldn’t see the road signs well. 2. The kitchen was flooded, ____________ we had to go to a restaurant. 3. I can’t lend you any money ____________ I don´t have any. 4. ____________ severe weather, the flight was delayed. 5. ____________ we don’t have to study today, let’s go to a picnic. Exercise 2: Rewrite the sentences using the connector given in brackets. 1. Paul was an hour late. He missed the train. (because) => ________________________________________________________________ 2. I borrowed your lawn mower. You weren’t using it. (as) => ________________________________________________________________ 3. We had no electricity during the storm. We had to use candles. (so) => ________________________________________________________________ 4. He needed a good mark. He studied hard for the test. (Since) => ________________________________________________________________ 5. It’s raining. We have decided to stay at home. (As) => ________________________________________________________________ 6. Tom won’t be able to go with us to the theatre. He has to work. (because) => ________________________________________________________________ 7. The windows were all open. A lot of mosquitoes came into the room. (Consequently) => ________________________________________________________________ 8. We knew what to expect. We were not surprised at what happened. (Therefore) => ________________________________________________________________ 9. Would you consider it? He asked nicely. (since) => ________________________________________________________________ 10. Mary joined the school theatre. She wanted to increase her circle of friends. (as) => ________________________________________________________________ 11. I don’t know the way. I’ll take a taxi. (as) => ________________________________________________________________ 12. I´ve forgotten my password. I can’t read my email. (so) => ________________________________________________________________ 13. I got home late. There was a flight delay. (because of) => ________________________________________________________________ Exercise 3: Rewrite the sentences, using a suitable connector. (Nối 2 câu lại với nhau sử dụng 1 từ nối phù hợp.) 1. Sue didn’t put on her sweater after the race. She got a cold. => ________________________________________________________________ 2. I turned the heating on. It was very cold. => ________________________________________________________________ 3. The lamp didn’t work. I took it back to the shop. => ________________________________________________________________ 4. He doesn’t drive. Dave always travels by train. => ________________________________________________________________ 5. You are going by the store on the way home from work. Would you mind picking up some trash bags? => ________________________________________________________________
(x+1)^2>= 1^2 tại sao lại có 2 trường hợp x+1>=1 hoặc x+1=<-1
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So sánh hình ảnh người nhân dân lính thú thời xưa và người nhân dân nghĩa sĩ cần giuộc
Gải hộ mk câu 1 phần tự luận với ạ
Giúp mình với ạ mình đang cần gấp mình cảm ơn
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