May 1st, 2017, 05:37 AM  #1 
Newbie Joined: Apr 2017 From: brasil Posts: 12 Thanks: 0  aplicated math
(Ingles) If the capital equals 2 out of 3 of the interest and the term of application is 5 months, what will be the interest rate considered? (Portugues) Se o capital for igual 2 sobre 3 dos juros e o prazo de aplicação for de 5 meses, qual será a taxa de juros considerada? (Espanhol) Si el capital es igual a 2, el 3 de interés y el plazo de solicitud es de 5 meses, lo que se considera la tasa de interés? 
May 1st, 2017, 01:28 PM  #2 
Senior Member Joined: Sep 2015 From: CA Posts: 1,207 Thanks: 615 
assuming monthly accrual $c + i = (1+r)^5 c$ $1 + \dfrac i c = (1+r)^5$ $1 + \dfrac 1 2 = (1+r)^5$ $(1.5)^{1/5}1 = r$ $r \approx 0.084 = 8.4\%$ 
May 1st, 2017, 05:52 PM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 9,082 Thanks: 624  
May 2nd, 2017, 12:29 AM  #4 
Senior Member Joined: Sep 2015 From: CA Posts: 1,207 Thanks: 615  
May 3rd, 2017, 12:00 PM  #5 
Newbie Joined: Apr 2017 From: brasil Posts: 12 Thanks: 0 
It's too difficult, give me some cousin.
Last edited by yury; May 3rd, 2017 at 12:02 PM. 

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