Cho A= (2x² -5)(4x + 1) – 8x²

^· Rút Gọn A

^· Tìm x khi A= -5

Giúp tớ với ^^

Biết rằng khi m = m 0 thì hàm số f(x) = x+( m 2 − 1) x 2 + 2x + m − 1 là hàm số lẻ. Mệnh đề nào sau đây đúng?

A.  m 0   ∈   ( 1 2   ;   3 )

B.  m 0   ∈ [ - 1 2   ;   0 )

C.  m 0   ∈ ( 0 ; 1 2 ]

D.  m 0   ∈ [ 3   ; + ∞ )

II. Read the passage. Circle A, B or C to answer each question or complete each sentence.

The Peace Corps is one of the most famous organisations in the world that help people. This organisation was founded in 1961 by the former US President John Kennedy.

People working in this organisation are called volunteers. They are both men and women. They live and work in other countries for two years at a time. They share skills with people to help solve challenging problems in developing countries.

Peace Corps volunteers work as teachers at schools. They also help communities to protect their environment and prevent the spread of diseases. They also help farmers grow more food efficiently.

Peace Corps volunteers build bridges of cross-cultural understanding with people of other countries. They help people from other countries learn more about who they are. Peace Corps volunteers also bring home with them better understanding of other peoples and cultures.

What can be the best title for the passage?

A.The Efforts of the Peace Corps

B.A John Kennedy's Creation

C.Building the Bridge Between Cultures

Cho tam giác ABC, M là trung điểm của BC, G là trọng tâm của tam giác ABC và AM=18cm. Độ dài đoạn AG là:

A. 12cm

B. 6cm

C. 9cm

D. 10cm