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Sabiendo que el payoff a vencimiento de una opci n call europea sobre el activo S con precio de ejercicio K y vencimiento en T

Sabiendo que el payoff a vencimiento de una opcin call europea sobre el activo S con precio de ejercicio K y vencimiento en T, es max{S(T)-K} y el precio de la opcin a tiempo t bajo la frmula de Black-Scholes es:
C(S,K,T)=S(t)**N(d1)-K**e-r****N(d2),
con d1=ln(StK)+(r+0.5**2)****2yd2=d1-**2
Demuestre lo siguiente:
limSC(S,K,T)=-K**e-r**,limS0+C(S,K,T)=0,limTC(S,K,T)=S(t),limtTC(S,K,T)=(S(T)-K)+
lim0+C(S,K,T)=(S(t)-K**e-r**)+,limKC(S,K,T)=0,limK0+C(S,K,T)=S(t),limrC(S,K,T)=S(t)
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