Question

Va rog ex 8 /c, d. Repede dau coroană! ​

Answer 1

8.

c)

1/2 + 1/3 + 1/6 =

Numitor comun 6

3/6 + 2/6 + 1/6 =

6/6 =

1

(4/12)^2 =

16/144 =

1/9

1^2011 • 9 =

9

*1 la orice putere este tot 1.

d)

1/3 - 1/9 =

Numitor comun 9

3/9 - 1/9 =

2/9

(2/9)^2 = 4/81

(1/3)^3 = 1/27

4/81 + 1/27 =

Numitor comun 81

4/81 + 3/81 =

7/81

(1/3)^4 = 1/81

7/81 • 81 =

7