Odpowiedź:
zad 7
7³⁾⁵ = ⁵√7³ = ⁵√343
3 ⁻¹⁾² = (1/3)¹⁾² = √(1/3) = 1/√3 = √3/3
zad 8
log₉x = 3
9³ = x
x = 9³
Odp: D
zad 9
log₄5 + log₄2 = log₄(5 * 2) = log₄10
Odp: D
zad 10
2 * log₃5 = log₃5² = log₃25
Odp: C
zad 11
3 * log₅2 = log₅2³ = log₅8
Odp: C
zad 12
a)
log₉3 + log₉27 = log₉(3 * 27) = log₉81 = 2
b)
log₂12 - log₂6 = log₂(12/6) = log₂2 = 1
