Question

Calcule o valor da base "a" nas igualdades:
a) log 81 = 4
b)log 243 = 5
c) log 1/9 = 2
d) log 16 = 2
e) log 10 = 2
f) log 1/8 = 3

Answer 1

a) log 81 = 4     = $\sqrt[4]{81} = 3$

b) log 243 = 5     =$\sqrt[5]{243} = 3$

c) log 1/9 = 2       = $\sqrt[2]{1/9} = 1/3$

d) log 16 = 2        = $\sqrt[2]{16} = 4$

e) log 100 = 2       = $\sqrt[2]{100} = 10$

f) log 1/8 = 3         = $\sqrt[3]{1/8} = 1/2$              ok