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Lapatulllka [165]
3 years ago
14

Un capital de S/. 42.000 colocado a una tasa de interés del 7% capitalizable anualmente, ¿en cuántos meses produce un interés de

S/. 8 700?
Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
3 0

Answer:

Se requiere 34 meses para producir un interés de 8700 soles.

Step-by-step explanation:

Asumamos que el capital aumenta conforme a una tasa de interés compuesto, cuya fórmula se describe aquí abajo:

C = C_{o}\cdot \left(1 + \frac{r}{100} \right)^{t} (1)

Donde:

C_{o} - Capital inicial, en soles.

C - Capital actual, en soles.

r - Tasa de interés mensual, en \frac{1}{a}.

t - Período de capitalización, en años.

Si sabemos que C_{o} = 42000, C = 50700 y r = 7\,\frac{\%}{a}, entonces el período de capitalización es:

C = C_{o}\cdot \left(1 + \frac{r}{100} \right)^{t}

\frac{C}{C_{o}} = \left(1 + \frac{r}{100}\right)^{t}

\ln \frac{C}{C_{o}} = t\cdot \ln \left(1 + \frac{r}{100}\right)

t = \frac{\ln C - \ln C_{o}}{\ln \left(1+\frac{r}{100} \right)}

t = \frac{\ln 50700 - \ln 42000}{\ln \left(1+\frac{7}{100} \right)}

t = 2.782\,yr

Es decir, se requiere 34 meses para producir un interés de 8700 soles.

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