Please solve the problem for me
Find the sum of the series
3+7+14+27+52+...................up to nth terms
So I don't know why you would imply the series is arithmetic or geometric in your descriptive title of the problem.
Once you've got the nth term of the series in terms of n, you'll have more luck finding the value of the series.
And in fact, you can still use this result. Use it to get the sum and then just add 1 to the result.