Question

Abra a questão tem imagem quero o cálculo

Answer 1

$\mathtt{\purple{Vamos~l\acute{a}!!!}}$

Para resolver essa $\mathsf{\green{func_{\!\!\!,}\tilde{a} o}}$ é preciso trocar o  $\mathsf{\green{n\acute{u}mero }}$ que está dentro do $\mathsf{\green{par\hat{e}nteses}}$ pela letra $\mathsf{\green{x}}$ que está na função e resolver e com o resultado de cada um nós trocamos pela pergunta que está em fração.

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$\mathtt{\pink{Resposta:}}$

(C) -3

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$\mathtt{\blue{Explicac_{\!\!\!,} \tilde{a}o:}}$

$\mathsf{\green{f(x)=3x-5}}$

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$\mathsf{f(0)=\red{-5}}$

$\boxed{\begin{array}{lr}\mathsf{\green{f(}\blue{0}\green{)}\green{=3\times}\blue{0}\green{-5}}\\\\\mathsf{f(0)=\red{-5}}\end{array}}$

$\underline{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}$

$\mathsf{f(-2)=\red{-11}}$

$\boxed{\begin{array}{lr}\mathsf{\green{f(}\blue{-2}\green{)}\green{=3\times}\blue{(-2)}\green{-5}}\\\\\mathsf{f(-2)=\red{-11}}\end{array}}$

$\underline{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}$

$\mathsf{f(1)=\red{-2}}$

$\boxed{\begin{array}{lr}\mathsf{\green{f(}\blue{1}\green{)}\green{=3\times}\blue{1}\green{-5}}\\\\\mathsf{f(1)=\red{-2}}\end{array}}$

$\underline{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}$

Agora basta nós pega essa fração$\Rightarrow~~\green{\mathsf{\dfrac{f(0)-f(-2)}{f(1)}}}$ e trocamos pelo resultado que deu cada um.

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$\large{\green{\mathsf{\dfrac{f(0)-f(-2)}{f(1)}}}=\mathsf{\dfrac{-5-(-11)}{-2} }=\mathsf{\dfrac{~~6~~}{-2~~}=\red{-3} }}$

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$\underline{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}$

$\boxed{\mathsf{Ass:\color{lime}\diagup\!\!\!\!T\diagup\!\!\!\!~~\diagup\!\!\!\!O~~\diagup\!\!\!\!O~~\diagup\!\!\!\!D~~\diagup\!\!\!\!Y~~}\maltese}$$\underline{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}$

Answer 2

Resposta:

$(c) \: \: - 3$

Explicação passo-a-passo:

$f(x) = 3x - 5$

$\frac{f(0) - f( - 2)}{f(1)} =$

$\frac{(3.0 - 5) - (3. - 2 - 5)}{3.1 - 5} = \frac{ - 5 - ( - 6 - 5)}{3 - 5} = \frac{ - 5 - ( - 11)}{ - 2} = \frac{ - 5 + 11}{ - 2} = \frac{6}{ - 2} = - 3$