Question

Va rog e urgentDau coroana. Urgeeeee t​

Answer 1

Răspuns:

Explicație pas cu pas:

11

5/4 + 3/4 = 8/4 = 2

1/2 + 3/4 = 2/4 + 3/4 = 5/4

1/6 + 3/4 = 2/12 + 9/12 = 11/12

7/8 + 3/4 = 7/8 + 6/8 = 13/8

5/12 + 3/4 = 5/12 + 9/12 = 14/12 = 7/6

_____________

12

3/4 + 1/6 = 9/12 + 2/12 = 11/12

______________

13

1/3 + 1/4 + 1/5 = 20/60 + 15/60 + 12/60 = 47/60

______________

14

a + b = 15

a*b = 56

(a + b)/a*b = 15/56

1/b + 1/a = 15/56