Question

5) (PUCRS) Escrever b ^(log b a) = b ^( − 2), equivale a escrever :

a) a = 1/b^(2)
b) b = a^(2)
c) a = b^(2)
d) b^(2) = − a
e) b = 1 /a^(2)

Answer 1

b^logb a → a

b^-2 → 1/b²

portanto:

b^logb a = b^-2

a = 1/b²

Alternativa A.