To compare and
, we need to analyze the behavior of the logarithmic function and the
expression inside the logarithm.
Simplify the expression inside the
logarithm
The expression inside the logarithm is a
quadratic:
This shows that the quadratic is always
greater than or equal to 2, because the term is always
non-negative, and the minimum value occurs when , where .
Therefore, the minimum value of is 2, which occurs at .
Thus, for all , the value of is always greater than or equal to 2.
Compare the logarithmic expressions
The logarithmic function is an
increasing function because the base is greater than 1. This means that if