Compute the following : (a) \( \log _{\frac{1} {3}} \sqrt[4]{729 \cdot \sqrt[3]{9^{-1} \cdot 27^...

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Compute the following :
(a) \( \log _{\frac{1} {3}} \sqrt[4]{729 \cdot \sqrt[3]{9^{-1} \cdot 27^{-4 / 3}}} \)
(b) \( \mathrm{a}^{\frac{\log _{\mathrm{b}}\left(\log _{\mathrm{b}} \mathrm{N}\right)}{\log _{\mathrm{b}} \mathrm{a}}} \)
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