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RENTA Aritmética
Inmediata Temporal PostPagable |
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| C1 = C |
C2 = C+d |
C3 = C+2d |
··· |
Cn-2 = C+(n-3)d |
Cn-1 = C+(n-2)d |
Cn = C+(n-1)d |
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La descomponemos como suma de rentas
ctes, una de cuntía C y n-1 de cuantía d, |
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Valor actual |
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C1 |
C2 |
Cn-3 |
Cn-2 |
Cn-1 |
Cn |
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Valor final |
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··· |
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0 |
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1 |
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n-3 |
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n-2 |
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n-1 |
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n |
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| R0 |
C· an | i |
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C |
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C |
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C |
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C |
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C |
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C |
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C· sn | i |
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··· |
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0 |
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1 |
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2 |
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n-3 |
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n-2 |
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n-1 |
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n |
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| R1 |
d· 1/an-1
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1 |
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d |
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d |
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d |
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d |
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d |
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d· sn-1 | i |
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··· |
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n-3 |
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n-2 |
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n-1 |
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n |
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| R2 |
d· 2/an-2
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2 |
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d |
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d |
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d· sn-2 | i |
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··· |
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0 |
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2 |
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n-3 |
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n-2 |
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n-1 |
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··· ··· |
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··· ··· ··· |
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··· ··· |
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| Rn-3 |
d· n-3/a3
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n-3 |
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d |
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d |
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d· s3 | i |
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0 |
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n-3 |
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n-2 |
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n-1 |
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| Rn-2 |
d· n-2/a2
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n-2 |
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d· s2 | i |
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n-2 |
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n-1 |
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| Rn-1 |
d· n-1/a1
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n-1 |
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d |
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d· s1 | i |
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n-1 |
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( V0)n | i = C·an
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+ d·∑s1,n-1s /an-s | i |
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C· sn | i +
d·∑s1,n-1 sn-s | i = ( Vn)n | i |
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VALOR Actual |
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| - |
Nuestro objetivo es calcular la suma de
las n-1 valoraciones de rentas ctes diferidas, |
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1 - (1+i)-(n-1) |
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1 - (1+i)-(n-2) |
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1 - (1+i)-1 |
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∑s1,n-1s /an-s
| i = |
(1+i)-1 |
+ |
(1+i)-2 |
+ ··· + |
(1+i)-(n-1) |
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(1+i)-1- (1+i)-n |
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(1+i)-2- (1+i)-n |
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(1+i)-3- (1+i)-n |
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(1+i)-(n-1)- (1+i)-n |
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= |
+ |
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+ ··· + |
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= [ (1+i)-1+ ··· +(1+i)-(n-1) - (n-1) (1+i)-n ] / i = [ (1+i)-1+ ··· +(1+i)-(n-1) + (1+i)-n - n (1+i)-n ] / i |
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= |
[ an | i - n (1+i)-n ] / i |
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an | i / i - n (1+i)-n / i |
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sustituimos en el valor actual, |
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( V0)n | i = C·an
| i + d ( an | i / i - n·(1+i)-n / i ) |
=> |
( V0)n | i = ( C+d/i ) an | i - d·n·(1+i)-n / i |
(*) |
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como,
an | i = [1 -
(1+i)-n] / i |
=> |
an | i = 1 /
i - (1+i)-n / i |
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an | i - 1 /
i = - (1+i)-n / i |
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( V0)n | i = (C+d/i) an | i + d·n ( an | i - 1/i ) = (
C + d / i + d·n ) an
| i - d·n / i =
A(C;d) n | i |
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VALOR Final |
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(Vn)n | i = (1+i)n ( V0) n | i = (1+i)n [ ( C + d / i ) an | i - d·n·(1+i)-n
/ i ] , usamos la expresión (*) |
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(Vn)n | i = ( C + d / i ) (1+i)n an
| i - d·n·(1+i)n·(1+i)-n / i = ( C + d / i ) sn | i - d·n / i |
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(Vn)n | i = (1+i)n·A(C;d) n | i = ( C + d / i ) sn | i - d·n / i = S(C;d) n | i |
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