Răspuns:
Explicație pas cu pas:
a)
1/2 + 1/3 = 3/6 + 2/6 = 5/6
b)
1/2 + 1/3 = 5/6
c)
√27 * 1/(√3)^3 = 3√3/3√3 = 1
d)
(1/5 + √5/5) : (1 + √5) = (1 + √5)/5 * 1/(1 + √5) = 1/5
