$\"\"$

\

The expression is $\"\"$ .

\

Evaluate the expression.

\

$\"\"$ (Original expression)

\

$\"\"$ (Let the logarithm equal $\"\"$ )

\

$\"\"$ (Logarithm formula: $\"\"$ if and only if $\"\"$ )

\

$\"\"$ (Substitute: $\"\"$ )

\

$\"\"$ (Definition of negative exponents: $\"\"$ )

\

Equality for exponential functions property: $\"\"$ if and only if $\"\"$ .

\

$\"\"$ .

\

$\"\"$ (Substitute $\"\"$ )

\

Therefore, value of logarithmic expression is $\"\"$ .

\

$\"\"$

\

The value of logarithmic expression is $\"\"$ .