Xét tính bị chặn của hàm số:Un = $\frac{1}{n}$+4

Question 15: The team __________ (prepare) for the big game for weeks, but they were still feeling nervous as they stepped onto the field.

Question 16: The students objected __________ (give) the same project as their previous assignment.

Question 17: Had it not been for my drinking too much tea, I __________ (not feel) light-headed now.

Question 18: The report was supposed __________ (submit) by yesterday, but I missed the deadline.

Question 19: The patient feels fortunate __________ (not experience) chronic symptoms for longer.

Finish each of the following sentences in such a way that it is as similar as possible in meaning to the sentence printed before it.

12. She was quite exhausted by the demanding timetable.

$\to$She found ____________________________________ .

13. "We are spending more on education than ever before," he claimed.

$\to$He claimed that more _____________________________________ .

suy nghĩ của em về vấn đề đặt ra trong câu chuyện hạt giống tâm hồn

$15\sqrt{x}-\frac{11}{x}+2\sqrt{x-3}+\frac{2\sqrt{x-2}}{1-\sqrt{x}}-2\frac{\sqrt{x+3}}{3}+\sqrt{x}$
a. Rút gọn A
b. Tìm x để A=1/2

$x^2$-25-4xy+$4y^2$

Cho tập hợp:
A={x$\in$R$|$ l2x-1l $\le$1}
B= {x$\in$R$|$l3x-6l>3}
C=[1;2]
Tìm các tập hợp

(${\sin }^{4}x$ - ${\cos }^{4}x$ + $co{s}^{2}x$)/(2(1 - cos x)) = ${\cos }^2\left(\frac{x}{2}\right)$

$\sqrt[4]{1-x^2}+\sqrt[4]{1+x}+\sqrt[4]{1-x}=3$

Question 1: The United States_______(lie) between Canada and Mexico.
Question 2: Three years_______(be) a long time to wait.
Question 3: The old man with his dog_______(pass) my house every morning
Question 4: Mr. Thomas as well as his assistants_______(arrive) here since yesterday.
Question 5: That you win a good place at a prestigious university_______(be) very
admirable.
Question 6: Neither her mother nor her father_______(want) her to be a teacher.
Question 7: Eight kilos of gold_______(steal) from the bank yesterday.
Question 8: The number of employees who_______ (not finish) their work yet
_______(have) to work on the weekend.
Question 9: The levels of intoxication_______(vary) from subject to subject.
Question 10: The money that_______(spend) on education every year is not enough.
Question 11: Two weeks_______(go) fast when you are on vacation.
Question 12: That you enjoy the food I cook_______(encourage) me a lot.
Question 13: Measles_______(be) cured without much difficulty nowadays.
Question 14: A number of children_______(sleep) in the bedroom now.
Question 15: My mother and my father_______(live) happily since they got married.
Question 16: Many a student_______(want) to study all day at school.
Question 17: Nowadays many students_______(like) playing games.
Question 18: Mathematics_______(be) considered as a difficult subject by many students.
Question 19: Tom, together with his friends,_______(want) to join the football team.
Question 20: The teacher as well as her students_______(disagree) with the new rule.
Question 21: Most of the food_______(prepare) by Jane's mother.
Question 22: Most of the students in class_______(get) high scores in the test.
Question 23: Our team_______(be) the best. It has a good chance of winning.
Question 24: There_______(be) a van and two cars in the parking area.
Question 25: Each package that is not properly wrapped_______(have) to be returned to the
sender.
Question 26: Not only my younger sister but also my friends_______(come) to my
university.
Question 27: Tom and Jerry_______(be) very well known all over the world.
Question 28: Both Jane and Laura_______(cook) for their dinner party at this time
yesterday.
Question 29: After the accident, the injured_______(take) to hospital yesterday.
Question 30: Either you or I_______(be) right.

(x-2)(x+2)+4(x-2)$\sqrt{\frac{x+2}{x-2}}$=-3

tìm x biết:$x^2$+2x-10=0 mình cần gấp

cho hình chữ nhật có chiều dài bằng 2 lần chiều rộng . Chu vi = 300 cm. Tính diện tích hình chữ nhật

$\frac{\sqrt{63y^3}}{\sqrt{7y}}$