Partial Sums

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem. You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

Find the first 4 partial sums and the nth partial sum of the sequence given by a sub n = 2n minus 1
Find the first 4 partial sums and the nth partial sum of the sequence given by b sub n = 1 over n minus the fraction with numerator 1 and denominator n + 1
Find the first 4 partial sums and the nth partial sum of the sequence given by c sub n = log left paren the fraction with numerator n and denominator n + 1 right paren