Question

Determine o valor de x:

Answer 1

f(x) = log3 (x-4)

a) f(x) = 3

log3 (x-4) = 3

3³ = x-4

27 = x-4

x = 31

f(x) = 1/2

log3 (x-4) = 1/2

3^(1/2) = x-4

√3 = x - 4

x = √3 + 4

f(x) = 0

log3 (x-4) = 0

3^0 = x-4

1 = x - 4

x = 5

d) f(x) = -4

log3 (x-4) = -4

3^(-4) = x-4

1/81 = x-4

x = 1/81 + 4

x = 325/81