Answer
$a^{4}b^{6}$
Work Step by Step
$(\frac{b^{\frac{3}{4}}}{a^{-\frac{1}{2}}})^{8}=(a^{\frac{1}{2}}b^{\frac{3}{4}})^{8}$
To simplify, we can use the power rule, which holds that $(a^{m})^{n}=a^{m\times n}$ (where a is a real number, and m and n are integers).
$(a^{\frac{1}{2}}b^{\frac{3}{4}})^{8}=a^{\frac{1}{2}\times8}b^{\frac{3}{4}\times8}=a^{\frac{8}{2}}b^{\frac{24}{4}}=a^{4}b^{6}$