Cho \(a;b;c>0\) thỏa mãn \(a+2b+3c\ge20\). Tìm giá trị nhỏ nhất \(A=a+b+c+\dfrac{3}{a}+\dfrac{9}{2b}+\dfrac{4}{c}\).

Cho \(2\ge xy\ge0\). Tìm giá trị nhỏ nhất \(A=\dfrac{x^2+y^2}{xy}\).

Cho \(a;b\ge0;a+b\le1\). Tìm giá trị nhỏ nhất \(A=ab+\dfrac{1}{ab}\).

Cho \(a;b\ge0;a+b\le1\). Tìm giá trị nhỏ nhất \(A=ab+\dfrac{1}{ab}\).

He / born / India / but / live / with his father / America / now.

A. He was born in India but he has lived with his father in America now.

B. He was born in India but he lives with his father in America now.

C. He was born in India but he lived with his father in America now.

D. He was born in India but he is living with his father in America now.

He / born / India / but / live / with his father / America / now.

A. He was born in India but he has lived with his father in America now.

B. He was born in India but he lives with his father in America now.

C. He was born in India but he lived with his father in America now.

D. He was born in India but he is living with his father in America now.

How long / it / take / get / New York / Rio de Janerio?

A. How long do it take you to get from New York to Riode?

B. How long does it take you getting from New York to Riode?

C. How long does it takes you getting from New York to Riode?

D. How long does it take you to get from New York to Riode?