[tex]\displaystyle\bf\\\frac{4^{-4} \cdot 2^{-6} }{16\cdot 8^{-5} } =\frac{(2^{2} )^{-4} \cdot 2^{-6} }{2^{4} \cdot (2^{3} )^{-5} } =\frac{2^{-8} \cdot 2^{-6} }{2^{4} \cdot 2^{-15} } =\\\\\\=\frac{2^{-8-6} }{2^{4-15} } =\frac{2^{-14} }{2^{-11} } =2^{-14-(-11)} =2^{-14+11} =\\\\\\=2^{-3} =\frac{1}{2^{3} } =\frac{1}{8} =0,125[/tex]
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[tex]\displaystyle\bf\\\frac{4^{-4} \cdot 2^{-6} }{16\cdot 8^{-5} } =\frac{(2^{2} )^{-4} \cdot 2^{-6} }{2^{4} \cdot (2^{3} )^{-5} } =\frac{2^{-8} \cdot 2^{-6} }{2^{4} \cdot 2^{-15} } =\\\\\\=\frac{2^{-8-6} }{2^{4-15} } =\frac{2^{-14} }{2^{-11} } =2^{-14-(-11)} =2^{-14+11} =\\\\\\=2^{-3} =\frac{1}{2^{3} } =\frac{1}{8} =0,125[/tex]