a) \(\dfrac{122}{123}\) và \(\dfrac{10}{11}\)

\(1-\dfrac{122}{123}=\dfrac{1}{123}\)              

\(1-\dfrac{10}{11}=\dfrac{1}{11}\)

Vì \(\dfrac{1}{123}< \dfrac{1}{11}\) nên ⇒ \(\dfrac{122}{123}< \dfrac{10}{11}\) 

b) \(\dfrac{16}{12}\) và \(\dfrac{99}{100}\)

\(\dfrac{16}{12}>1\) và \(\dfrac{99}{100}< 1\)

⇒ \(\dfrac{16}{12}>\dfrac{99}{100}\)

c) \(\dfrac{35}{70}\) và \(\dfrac{6}{11}\)

\(\dfrac{35}{70}=\dfrac{1}{2}\) = \(\dfrac{6}{12}\)

Vì \(\dfrac{6}{12}< \dfrac{6}{11}\) nên ⇒ \(\dfrac{35}{70}< \dfrac{6}{11}\)

1-5/6=1/6

1-2/7=5/7

1/6 <2/6< 5/7

vậy 5/6 <2/7

ko chắc chắn, đúng k mk nhé

\(A=\frac{10}{a^m}+\frac{10}{a^n}\)

\(B=\frac{11}{a^m}+\frac{11}{a^n}=\left(\frac{10}{a^m}+\frac{10}{a^n}\right)+\left(\frac{1}{a^m}+\frac{1}{a^n}\right)\)

Vậy A < B

chọn đúng nhé !

cùng huyện nha

9/7>11/12

2/15<3/12

38/39<39/40

a) \(\dfrac{8}{9}< 1;\dfrac{13}{7}>1\Rightarrow\dfrac{8}{9}< \dfrac{13}{7}\)

b) \(\dfrac{16}{27}>\dfrac{15}{27}>\dfrac{15}{29}\Rightarrow\dfrac{16}{27}>\dfrac{15}{29}\)

a) 13/7

b) 15/29

c) \(\dfrac{181818}{232323}=\dfrac{18x10101}{23x10101}=\dfrac{18}{23}< \dfrac{19}{23}\Rightarrow\dfrac{19}{23}>\dfrac{181818}{232323}\)

giúp mik với ạ!!!

Câu 2: B

Câu 3: B

Câu 4: A