dovediti ca a= radical 1/4 +radical 1/9+ radical 49/36 este un nr natural

Răspuns:
Da
Explicație pas cu pas:
radical 1/4+radical1/9+radical 49/36 nr natural?
radical 1=1
radical 4=2
radical 9=3
radical 49=7
radical 36=6
1/2+1/3+7/6=? (factorul comun =6)
3/6+2/6+7/6=12/6=2
2apartine N natural