Resposta :
- [tex]\underbrace{\sf{\dfrac{13}{12}}}[/tex]
Explicação passo-a-passo:
- 2,3,4/2
- 1,3,2/2
- 1,3,1/3
- 1,1,1/_____/ 2.2.4=12
_____________________
- [tex]\sf{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}}[/tex]
- [tex]\dfrac{(6+4+3)}{12}[/tex]
- [tex]\underbrace{\dfrac{13}{12}}[/tex]