Thus we have If n → ∞ {\displaystyle n\to \infty } , then ( 1 − c ) n → 0 {\displaystyle (1-c)^{n}\to 0} so that D n {\displaystyle D_{n}} converges to zero.
Así, temos que Se n → ∞ {\displaystyle n\to \infty } , entón ( 1 − c ) n → 0 {\displaystyle (1-c)^{n}\to 0} , polo que D n {\displaystyle D_{n}} converxe a cero.