Question

Resolva :
$a)5^{9} \div 5^{3} \\ b)11^{ - 5} \\ c)(3^{8} \div 3^{7}).3^{4} \\ d)(10 ^{8} \div10) \div 10$
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Answer 1

Explicação passo-a-passo:

$a)\\ \\ 5^9\div5^3=5^{9-3}=5^6\\ \\ b)\\ \\ 11^{-5}={1\over11^{5}}\\ \\ c)\\ \\ (3^8\div3^7).3^4=\\ \\ (3^{8-7}).3^4=\\ \\ 3^1.3^4=\\ \\ 3^{1+4}=3^5\\ \\ d)\\ \\ (10^8\div10)\div10=\\ \\ (10^{8-1)}\div10=\\ \\ 10^7\div10=\\ \\ 10^{7-1}=10^6$

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corrigindo a letra b

$11^{-5}\div11^5=11^{-5-5}=11^{-10}$