Răspuns :
Răspuns:
Explicație pas cu pas:
a=5/6+1/6=1 ∈N
b=1/12+1/18+31/36=(3+2)/36+31/36=5/36+31/36=36/36=1∈N
c=(5+4x11+2x111)/100=271/100 ∉N
d=(3x17+2x13)/90=(51+26)/90=77/90 ∉N
e=(3x25+4x11)/72=(75+44)/72=119/72 ∉N
Răspuns:
Explicație pas cu pas:
a=5/6+1/6=1 ∈N
b=1/12+1/18+31/36=(3+2)/36+31/36=5/36+31/36=36/36=1∈N
c=(5+4x11+2x111)/100=271/100 ∉N
d=(3x17+2x13)/90=(51+26)/90=77/90 ∉N
e=(3x25+4x11)/72=(75+44)/72=119/72 ∉N