Đạo hàm cấp hai của hàm số y=1/(2x-3) bằng biểu thức nào dưới đây?

A.  8 2 x - 3 3

B. - 8 2 x - 3 2

C. 4 2 x - 3 2

D. - 4 2 x - 3 2

Rewrite sentences without changing the meaning

It’s tiring to sit in front of the computer for hours.

A. Sitting in front of the computer for hours is tiring.

B. Sit in front of the computer for hours is tiring.

C. Sat in front of the computer for hours is tiring.

D. To sit in front of the computer for hours is tiring.

Choose the best answer to complete these following sentences.

We are going to _______the anniversary of our 50 th wedding.

A. celebrate

B. celebrated

C. celebrating

D. to celebrate