Resposta do livro – 16,5670%
\(\[\begin{align}
& PV\text{ }=\text{ }Valor\text{ }a\text{ }vista \\
& E\text{ }=\text{ }entrada \\
& Logo: \\
& (PV-E){{.1,04}^{3}}=financiamento \\
& PMT\text{ }=\text{ }PV/10 \\
& i\text{ }=\text{ }4%\text{ }a.m. \\
\end{align}\]
\)
\(\[\begin{align}
& Equacionando: \\
& PV*({{1,04}^{1}}2-1)=(PV-E)*{{1,04}^{3}}*0,04*{{1,04}^{1}}2*10 \\
& PV*0,601032219\text{ }=\text{ }\left( PV\text{ }E \right)*0,720377402203\text{ } \\
& PV*0,720377402203\text{ }\text{ }E*0,720377402203 \\
& PV*\left( 0,720377402203\text{ }\text{ }0,601032219 \right)\text{ }=\text{ }E*0,720377402203 \\
& E\text{ }=\text{ }PV*\left( \frac{0,119345183635}{0,720377402203}\text{ } \right) \\
& E\text{ }=\text{ }PV*0,16567 \\
& \frac{16567}{100}\to 16,567% \\
\end{align}\]
\)
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