Tìm hệ số cao nhất của đa thức k(x) biết f(x) + k(x) = g(x) và f ( x )   =   x 4   -   4 x 2   +   6 x 3   +   2 x   -   1 ;   g ( x )   =   x   +   3

A. -1

B. 1

C. 4

D. 6

Hình chữ nhật ABCD có diện tích là  36   c m 2 , đoạn AB = 9cm, DM = 3cm.

Tính diện tích tam giác AMC

We arrived at the conference. Then we realized that our reports were still at home.

A. No sooner had we realized that our reports were at home than we arrived at the conference.

B. Only after we arrived at the conference did we realize that our reports were still at home.

C. Not until we arrived at the conference that we realized that our reports were still at home.

D. Hardly had we arrived at the conference that we realized that our reports were still at home.

He said we could either go by train or by plane.

A. said

B. could

C. go

D. by plane

Giá trị lớn nhất của hàm số y = 2 x 3 + 3 x 2 − 12 x + 2  trên đoạn − 1,2  là

A. 15

B. 66

C. 11

D. 10