$\"\"$

(a)

The function $\"\"$ .

The function is not defined when the denominator is zero.

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$\"\"$ .

Apply natural logarithm on each side.

$\"\"$

Power property of logarithms: $\"\"$ .

$\"\"$

Domain of the function is $\"\"$ .

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(b)

The function $\"\"$ .

The function is not defined when the denominator is zero.

$\"\"$

Apply ln on each side.

$\"\"$ .

The solution does not exist.

Domain of the function is all real numbers.

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(a) Domain of the function is $\"\"$ .

(b) Domain of the function is all real numbers.