Question

\(\dfrac{-1}{3}< \dfrac{?}{36}< \dfrac{?}{18}< \dfrac{-1}{4}\)

Answer 1

Điền vào chỗ ? nha mọi người

 

Answer 2

\(-\dfrac{1}{3}< \dfrac{x}{36}< \dfrac{y}{18}< -\dfrac{1}{4}\)

\(\Leftrightarrow\dfrac{-12}{36}< \dfrac{x}{36}< \dfrac{2y}{35}< \dfrac{-9}{36}\)

\(\Leftrightarrow-12< x< y< -9\)

\(\left(x,y\right)=\left(-11,-10\right)\)

Answer 3

Ta có: \(\dfrac{-1}{3}< \dfrac{x}{36}< \dfrac{y}{18}< \dfrac{-1}{4}\)

\(\Leftrightarrow\dfrac{-12}{36}< \dfrac{x}{36}< \dfrac{2y}{36}< \dfrac{-9}{36}\)

Suy ra: -12<x<2y<-9

\(\Leftrightarrow\left(x,y\right)\in\left\{\left(-11;-5\right)\right\}\)

Answer 4

Giải:

\(-\dfrac{1}{3}< \dfrac{x}{36}< \dfrac{y}{18}< -\dfrac{1}{4}\) 

\(\Rightarrow-\dfrac{12}{36}< \dfrac{x}{36}< \dfrac{2y}{36}< -\dfrac{9}{36}\) 

\(\Rightarrow-12< x< 2y< -9\) 

\(\Rightarrow\left(x;y\right)=\left\{\left(-11;-5\right)\right\}\) 

Chúc bạn học tốt!