Chứng minh các bất đẳng thức n n 2   +   1 ≤ 1 2 và n 2 + 1 2 n ≥ 1  với mọi n   ∈   N * .

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Boy: “What is your greatest phobia?” 

Girl: “________________________”

A. I'm afraid not

B. Worms, definitely!

C. Probably people who smoke

D. I haven't made up my mind

Choose A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

He luckily inherited a lucrative business from his father

A. loss- making

B. losing

C. Wealthy

D. profitable