Question

determine o mmc e efetue : 1 sobre 2+ 1 sobre 3 +1 sobre 4 +1sobre 5

Answer 1

$\frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} \\ \\ mmc(2,3,4,5) = 60 \\ \\ \frac{1}{2/30} + \frac{1}{3/20} + \frac{1}{4/15} + \frac{1}{5/12} \\ \\ \\ \frac{30+20+15+12}{60} \\ \\ \frac{77}{60}$

Answer 2

1/2 + 1/3 + 1/4 + 1/5 = 
m.m.c(2,3,4,5,) = 2.2.3.5 = 60
2,3,4,5|2
1,3,2,5|2
1,3,1,5|3
1,1,1,5|5
1,1,1,1
30/60 + 20/60 + 15/60 + 12/60 = 77/60