Recent questions tagged sequence-series

1 votes
0 answers
1
The sum of $n$ terms of the series $4+44+444+\ldots .$ is $(4 / 81)\left[10^{n+1}-9 n-1\right]$$(4 / 81)\left[10^{n-1}-9 n-1\right]$$(4 / 81)\left[10^{n+1}-9 n-10\right]$...
0 votes
0 answers
2
0 votes
0 answers
3
0 votes
0 answers
5
0 votes
0 answers
6
0 votes
0 answers
8
0 votes
0 answers
9
0 votes
0 answers
10
To see more, click for the full list of questions or popular tags.