Resposta:
PV = PMT * (1 + i) * [1 - (1 + i)^-n] / i
PV = 15.000 * (1 + 0,1) * [1 - (1 + 0,1)^-6] / 0,1
PV = 15.000 * (1,1) * [1 - (1,1)^-6] / 0,1
PV = 15.000 * (1,1) * [1 - 0,56447393] / 0,1
PV = 15.000 * (1,1) * [0,43552607] / 0,1
PV = 15.000 * (1,1) * 4,355260699
PV = 15.000 * 4,790786769
PV = 71.861,80
queria saber se esta certo....
por ![\frac{\sqrt[]{\sqrt[4]{8}+\sqrt[]{\sqrt[]{2}-1}}-\sqrt[]{\sqrt[4]{8}-\sqrt[]{\sqrt[]{2}-1}}}{\sqrt[]{\sqrt[4]{8}-\sqrt[]{\sqrt[]{2}+1}}}](/latexrender/pictures/981987c7bcdf9f8f498ca4605785636a.png "\frac{\sqrt[]{\sqrt[4]{8}+\sqrt[]{\sqrt[]{2}-1}}-\sqrt[]{\sqrt[4]{8}-\sqrt[]{\sqrt[]{2}-1}}}{\sqrt[]{\sqrt[4]{8}-\sqrt[]{\sqrt[]{2}+1}}}")
![\sqrt[]{2}](/latexrender/pictures/f21662d1cabab6e8b273a4b6f1cd663a.png "\sqrt[]{2}")
e elevar ao quadrado os dois lados)