6.
$$a = \log _ { 2 } x \quad b = \log _ { 2 } ( x + 8 )$$
Express in terms of \(a\) and/or \(b\)
- \(\log _ { 2 } \sqrt { x }\)
- \(\log _ { 2 } \left( x ^ { 2 } + 8 x \right)\)
- \(\log _ { 2 } \left( 8 + \frac { 64 } { x } \right)\)
Give your answer in simplest form.