$\"\"$

The equation is $\"\"$ .

Write an exponential form.

$\"\"$ (Original equation)

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

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

Therefore, the equation in exponential form is $\"\"$ . $\"\"$

The exponential form of the equation is $\"\"$ .