a) Ta có:
\(\dfrac{7}{11}=0,\left(63\right)\)
\(\dfrac{8}{-13}=-0,\left(615384\right)\)
\(\dfrac{37}{19}\approx1,95\)
\(\dfrac{-5}{13}=-0,\left(384615\right)\)
\(\Rightarrow-0,\left(615384\right)< -0,\left(384615\right)< 0< 0,\left(63\right)< 1,95\)
\(\Rightarrow\dfrac{8}{-13}< \dfrac{-5}{13}< 0< \dfrac{7}{11}< \dfrac{37}{19}\)
b) Ta có:
\(\dfrac{-9}{17}\approx-0,53\)
\(-\dfrac{6}{5}=-1,2\)
\(\dfrac{7}{-17}\approx-0,41\)
\(\Rightarrow-3,4< -1,2< -1,02< -0,53< -0,41< 0\)
\(\Rightarrow-3,4< -\dfrac{6}{5}< -1,02< \dfrac{-9}{17}< \dfrac{7}{-17}< 0\)
a: 0<7/11
7/11<1
1=19/19<37/19
=>0<7/11<37/19
mà -8/13<-5/13<0
nên -8/13<-5/13<0<7/11<37/19
b: -1<-9/17<-7/17<0
-3,4<-1,2=-6/5<-1,02<-1
Do đó: -3,4<-6/5<-1,02<-1<-9/17<-7/17<0