Question

what is the lub and glb of the following sets, in the set of real numbe if exists E={ 0.2,0.23,0.234,0.2343,0.23434,0.23434,...}​

Answer 1

Hello,

Explanation:

`LUB(E)=0.2=(1)/(5) \\\\GUB(E)=0.2 34 34 34 ....=0.2+(1)/(10) *0.343434....\\\\=(1)/(5) +(1)/(10) *(34)/(99) \\\\=(198+34)/(990) \\\\=(116)/(495)`