Question

qual o segredo pra eu resolver função logaritima

Answer 1

É vital que saiba as propriedades logarítmicas, e noções de funções também
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Definição de logaritmo:

$log_{b}(a)=c~~\ \textless \ =\ \textgreater \ ~~b^{c}=a\\\\b\ \textgreater \ 0~e~b\neq1~~(base)\\a\ \textgreater \ 0~~(logaritmando)$
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Propriedades:

$\boxed{\boxed{log_{10}(a)=log~a}}\\\\\\\boxed{\boxed{log_{\alpha}(a\cdot b\cdot c\cdot...\cdot z)=log_{\alpha}(a)+log_{\alpha}(b)+log_{\alpha}(c)+...+log_{\alpha}(z)}}\\\\\\\boxed{\boxed{log_{b}\left(\dfrac{x}{y}\right)=log_{b}(x)-log_{b}(y)}}\\\\\\\boxed{\boxed{log_{b}(a^{n})=n\cdot log_{b}(a)}}\\\\\\\boxed{\boxed{log_{b}(a)=\dfrac{log_{c}(a)}{log_{c}(b)}}}~~~(mudanca~de~base)\\\\\\\boxed{\boxed{log_{b}(a)\cdot log_{c}(b)=log_{c}(a)}}\\\\\\\boxed{\boxed{log_{b}(a)=\dfrac{1}{log_{a}(b)}}}$