Formula expansion ratio

L = cte //Longitud
n = cte //numero de celdas
ratio = cte //expansion ratio
sum c0...cn-1 = L

Como indexamos desde 0, va hasta n-1
c0 = l
c1 = cratio * c0
c2 = cratio * c1
.
.
.
cn-1 = cratio * cn-2 = ratio*c0

cn-1 = cratio^2 * cn-3 = ratio*c0
(reemplazando para atras)
cn-1 = cratio^(n-1) * cn-n = ratio*c0
cn-1 = cratio^(n-1) * c0 = ratio * c0
cratio^(n-1) = ratio
cratio = ratio^(1/(n-1))

Ademas sum c0...cn-1 = L
sum(cratio^i * c0) = L
c0 sum(cratio^i) = L
https://en.wikipedia.org/wiki/Geometric_series#Sum
c0 (1 - cratio^n)/(1 - cratio) = L
c0 = L * (1 - cratio) / (1 - cratio^n)


Para nuestro caso

L = 0.08
n = 800
ratio = 10
cratio = 10^(1/799) ~ 1.00288599
c0 ~ 0.08 * (1- 1.00288599) / (1 - 1.00288599^800) = 0.0000255712