Question

qual a taxa mensal equivalente a juros compostos a 200% ao ano?

Answer 1

$\mathsf{1+i_{a}=(1+i_{m})^{12}\to~i_{m}=\sqrt[12]{1+i_{a}}-1}$

$\mathsf{i_{m}=\sqrt[12]{1+2}-1}\\\mathsf{i_{m}=0,095\times100=9,5\%~a.m}$