Question

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Answer 1

9.

$frac{ {5}^{k} }{ {5}^{ - 4} } = {5}^{k + 4} \ {( {5}^{k} )}^{ - 4} = {5}^{ - 4k} \ frac{ {2}^{ - 9} times {2}^{ - 3} }{ {2}^{ - 7} } = {2}^{ - 5}$

$frac{ {5}^{k} }{ {5}^{4} } = {5}^{k - 4} \ frac{ {3}^{ - 2} times {3}^{ - 9} }{ {3}^{ - 8} } = {3}^{ - 3} \ {125}^{n} = {5}^{3}$

10.

$frac{ {( {c}^{ - 8} )}^{ - 6} }{ {c}^{ - 4} } = {c}^{52} \ frac{ {x}^{ - 4} }{ {x}^{6} times {x}^{2} } = {x}^{ - 12}$