500*(1+7%/12)^24=574.9
500*(1+7%/4)^8=574.4
500*(1+7%/2)^4=573.76
500*(1+7%)^2=572.45
P(P/A,8%,5)=200*((1+8%)^5-1))/8%*((1+8%)^5))=
F(F/P,8%,5)=200*((1+8%)^5)=
30*1.1^5+30*1.1^4=
A(A/F,10%,3)=F*(1.1^3-1)/(0.1)
F=P*(1+r)^n
P=F*(1+r)^-n
F=A*((1+r)^n-1)/r)
P=A*((1+r)^n-1/(r*(1+r)^n))
(1+(0.1/2))^2-1=0.1025
1000*(1+0.1025)^5=