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[tex]e) \sqrt{6^{5} } :\sqrt{6^{3} } =\sqrt{6^{5-2} } =\sqrt{6^{2} } =6[/tex]
[tex]f) \sqrt{64} : \sqrt{2^{3} } :\sqrt{2} =8:\sqrt{2^{3-1} } =8:\sqrt{4} =8:2=4[/tex]
[tex]g) \sqrt{5^{3} } :\sqrt{5} =\sqrt{5^{3-1} } =\sqrt{5^{2} } =\sqrt{25} =5[/tex]