Trong không gian với hệ tọa độ Oxyz, cho điểm M(-3;1;2) và mặt phẳng \(\left(\alpha\right):2x+2y+z-7=0\). Giả sử mặt cầu (S) tâm M cắt mặt phẳng \(\left(\alpha\right)\) theo giao tuyến là một đường tròn có bán kính bằng 4. Khi đó phương trình mặt cầu (S) là:
A. \(x^2+y^2+z^2+6x-2y-4z+11=0\)
B. \(x^2+y^2+z^2+6x-2y-4z-11=0\)
C. \(x^2+y^2+z^2-6x+2y+4z+11=0\)
D. \(x^2+y^2+z^2-6x+2y+4z-11=0\)
(Giải thích giùm mình)
Trong không gian tọa độ Oxyz, cho mặt cầu (S): \(x^2+y^2+z^2-2x+4y-2z-8=0\) và mặt phẳng (P): 2x+3y+z-11=0. Viết phương trình mặt phẳng (Q) song song với mặt phẳng (P) và cắt mặt cầu (S) theo một đường tròn có bán kính bằng một nửa bán kính mặt cầu (S).
A.\(\left(Q_1\right):2x+3y+z-3+7\sqrt{3}=0;\left(Q_2\right):2x+3y+z-3-7\sqrt{3}=0\)
B. \(\left(Q_1\right):2x+3y+z+3+7\sqrt{3}=0;\left(Q_2\right):2x+3y+z+3-7\sqrt{3}=0\)
C. \(\left(Q_1\right):2x-3y+z+3+7\sqrt{3}=0;\left(Q_2\right):2x-3y+z+3-7\sqrt{3}=0\)
D. \(\left(Q_1\right):2x+3y-z+3+7\sqrt{3}=0;\left(Q_2\right):2x+3y-z+3-7\sqrt{3}=0\)
(Giải thích giùm mình)
Choose the correct form from the two choices given.
1. I went to work (in spite/ despite)...............having a hight temperature.
2. I regret (sending/to send)...............that letter. I wrote some very unkind things in it.
3. Some parents don't let their children (to go/go)................out on weekday evenings.
4. Unless (you/you'll).............drive more slowly, you'll have an accident.
5. Sarah was on the point (to go/of going)...............to bed when the phone rang.
6. There's a meeting at six o'clock, but you (don't have to/mustn't)............come if you don't want to.
7. What would you do if you (win/won).....................the lottery?
8. The sky is very dark - I think it is going to (rain/raining)......................
1. She is so busy, so she can't come to the party
-> If she.................................................................... (could)
2. John asked Mary, "Can you lend me some money?"
->John asked mary........................................................(could)
3. It's three months since she started learning English.
-> She...................................................................... (for)
4. I haven't got the money, so I'm not going on holiday
-> If I............................................................................. (would)
5. She said: "I'll call the police if you don't leave immediately".
-> She............................................................................. (threatened)
6. Although she had set off late, Jenny caught the train
-> Despite ..................................................................................(managed)
7. Nobody thought Alan was good enough to win the championship
-> Nobody thought Alan..................................................................(capable)
8. I could probably touch my toes if I tried
-> I......................................................................................................(able)