Odpowiedź:
zad 1
a = 2√12/√2 * √6 = 2√(12/2) * √6 = 2√6 * √6 = 2 * 6 = 12
b = ∛16/∛3 * ∛12 = ∛(16/3 * 12) = ∛(16 * 4) = ∛64 = ∛4³ = 4
a * b = 12 * 4 = 48 - liczba naturalna c.n.u
zad 2
x - wiek Kasi
3x - wiek mamy
(3x + 12)/(x + 12) = 2
3x + 12 = 2(x + 12)
3x + 12 = 2x + 24
3x - 2x = 24 - 12
x = 12
Odp: Kasia ma obecnie 12 lat
