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RENTA Geométrica
Inmediata Temporal PrePagable |
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VALOR Actual |
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| - |
Las proyecciones de las n cuantías por
contracapitalización forman una prog. geométrica. |
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| an |
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C·qn-1(1+i)-(n-1) |
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··· |
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| as |
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C·qs-1(1+i)-(s-1) |
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C·q2·(1+i)-2 |
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C·q·(1+i)-1 |
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| a1 |
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C1 = C |
C·q |
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C·q2 |
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Cs=C·qs-1 |
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Cn=C·qn-1 |
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··· |
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··· |
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0 |
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1 |
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2 |
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s-1 |
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n-1 |
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n |
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Sn = C + C·q·(1+i)-1 + C·q2·(1+i)-2 + ··· + C·qn-1(1+i)-(n-1) = ∑s1,n as = ∑s1,n C qs-1(1+i)-(s-1) |
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podemos sacar factor comun para reducir
el cálculo de la suma de prog. geom. as, |
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Sn = C [ 1 + q (1+i)-1 + q2(1+i)-2 + ··· + qn-1(1+i)-(n-1) ] = C ∑s1,n a's = C S'n |
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| - |
( ··V0)n | i = C S'n = (1+i)
C (1+i)-1 S'n = (1+i)
A(C;q) n | i
= ··A(C;q) n | i |
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VALOR Final |
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| - |
Las proyecciones de las n cuantías por
capitalización forman una prog. geométrica. |
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C·(1+i)n |
an |
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C·q·(1+i)n-1 |
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C·q2(1+i)n-2 |
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C·qs-1(1+i)n-(s-1) |
as |
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C·qn-1(1+i) |
a1 |
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C1=C |
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C·q |
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C·q2 |
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Cs=C·qs-1 |
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Cn=C·qn-1 |
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··· |
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s-1 |
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n-1 |
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Sn = C·qn-1(1+i) +
··· + C·q·(1+i)n-1 + C·(1+i)n = ∑s1,n as = ∑s1,n C qs-1(1+i)n-(s-1) |
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podemos sacar factor comun para reducir
el cálculo de la suma de prog. geom. as, |
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Sn = C (1+i)n [ qn-1(1+i)-(n-1) + ··· + q·(1+i)-1 + 1 ] = C (1+i)n ∑s1,n a's = C (1+i)n S'n |
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| - |
( ··Vn)n | i = (1+i)n C S'n = (1+i)n ··A(C;q) n | i = ··S(C;q) n | i |
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CASO PARTICULAR para q = 1+i |
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Cuando esto ocurre se tiene una
indeterminación. Se deriva por L'Hôpital y se sustituye q. |
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| ··A(c;1+i) n | i |
= lim |
··A(c;q) n | i |
= lim |
(1+i) A(C;q) n | i |
= (1+i) · C · n · (1+i)-1 = C · n |
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q → 1 +i |
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q → 1 +i |
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| ··S(c;1+i) n | i |
= lim |
··S(c;q) n| i |
= lim |
(1+i)n ··A(C;q) n | i |
= (1+i)n · C · n = (1+i)n ··A(c;1+i) n | i |
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q → 1 +i |
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q → 1 +i |
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