tổng số phân tử của tập hợp B {x=\(\dfrac{3n^2+3}{2}\)/n∈N và \(\dfrac{3}{2}\)<x<609}

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

Is it necessary to meet the manager at the airport?

A. Did the manager have to be met at the airport?.

B. Does the manager have to be met at the airport?

C. Is the manager had to be met at the airport?

D. Does the manager have to meet at the airport?

“What qualities do you have that make you a suitable candidate for this post?”

“________”

A. Well, I have a lot if qualifications that match

B. I’m highly qualified for the post

C. I used to work in a similar position for two years

D. I consider myself to be trust worthy, responsible and punctual 

vừa chia hết cho 2 vừa chia hết cho 3

vì 2x3=6

tick nhé

Tính đạo hàm của hàm số  y = 3 1 + x

A. y ' = 1 + x .3 x

B. y ' = 3.3 x . ln 3

C. y ' = 3 ln 3 .3 x

D. y ' = 3 1 + x . ln 3 1 + x

Viết biểu thức 25 x 2   –   20 x y   +   4 y 2 dưới dạng bình phương của một hiệu

A. 5 x   –   2 y 2  

B.  2 x   –   5 y 2

C.  25 x   –   4 y 2

D.  5 x   +   2 y 2

A: You should ___________ in bed.

B: I can’t.