Question

Which statement is true?

Answer 1

3 is correct , base is never equal to 1 cause all of solves of logarithm will be 0

Answer 2

Answer with explanation:

Consider a Logarithmic Function

  $y=\log_{a} b\\\\y=\frac{\log b}{\log a}\\\\ \text{if, a=1,then}\\\\y=\frac{\log b}{\log 1}\\\\y=\frac{\log b}{0}$

which is not defined.

Also,⇒ a∈(0,∞)≠1.

b> 0, that is, b∈(0,∞)

Option C:

 is not a logarithmic function because the base is equal to 1.