To show that the sequence converge, we need to show that the limit of the nth term when n tends to infinity is a constant.
Usually we can not find limits of factorials, so we need to rewrite our problem a little differently.
`(10^n)/(n!)=(10^10)/(10!)xx(10/11)xx(10/12)xx(10/13)xx...(10/n)` From that we can conclude:
If we can show that the left hand side and right hand side of the above inequality have the same limit, then the middle expression will have the same limit.
Note that `lim_(n->oo)0=0`
and since 10/11 is less than one we have `lim_(n->oo)(10^10/(10!))xx(10/11)^(n-10)=(10^10)/(10!)xx0=0`
Since the previous two limits equal the same number, then
Hence your sequence converge.