Odpowiedź:
zad 4
a)
∛8 = 2
a = 8
b)
∛1000000 = 100
b = 1000000
c)
∛(8/27) = 2/3
c = 8/27
d)
∛3,375 = 1,5
d = 3,375
zad 7
∛2 ≈ 1,26 ; ∛3 ≈ 1,44
a)
∛2 + 2 ≈ 1,26 + 2 ≈ 2,26
b)
3 - ∛3 ≈ 3 - 1,44 ≈ 1,56
c)
∛2/2 ≈ 1,26/2 ≈ 1,13
d)
∛3 - ∛2 ≈ 1,44 - 1,26 ≈ 0,18
zad 9
a)
x³ = 64
x = ∛64 = 4
b)
x³ = 8/27
x = ∛(8/27) = 2/3
c)
∛x = 10
x = 10³ = 1000
d)
∛x = - 7
x = - 7³ = - 343
