So sánh các phân số sau

a) \(\dfrac{77}{76}\) và \(\dfrac{84}{83}\) c) \(\dfrac{456}{461}\) và \(\dfrac{2013}{2018}\)

b) \(\dfrac{66}{77}\) và \(\dfrac{73}{83}\) d) \(\dfrac{109}{2012}\) và \(\dfrac{1001}{2016}\)

55hoac220hoac275

Giống:

_Thanh tiêu đề

_Thanh trạng thái

_ Thanh cuốn dọc cuốn ngang

_Thanh công cụ

Khác:

Of all people, my mother is the person I admire most. At the age of forties, my mother seems to be still young. She teaches at a primary school. Teaching is hard work but she loves it. I admire my mother for some reasons. First of all, my mother is a caring woman. She has devoted all her life to taking care of me. I still remember when I was six, I had to go to hospital for a surgery. When I first woke up, my mother was still beside me. At that moment, I realized how much I love her. In addition, my mother is the person I can count on. She is always the first to listen to all my problems and give me some useful advice. Thanks to her encouragement, I have overcome all difficulties. In brief, I am very proud of my mother. She is always the person who inspires me most.

Với giá trị nào của a thì phương trình 3 x + 2 a x = − 1 có nghiệm duy nhất?

A.  a > 3 2

B.  a < − 3 2

C.  a ≠ 3 2 ∧ a ≠ − 3 2

D.  a < − 3 2 ∨ a > 3 2