This allows you to add the sums one of two ways. You can add the individual terms first and then sum all of them or you can sum the indivdual terms and add the two answers. This allows you to either multiply each term by c then add the series, or first add the series and then multipy the result by c. Your job in this section, is to learn to write sigma notation in expanded form and vice versa. Sample Problems Write each series in expanded form.
Answers are down the page.
The series starts with the first term and ends with the tenth term. It is summing 9k. This series alternates in sign. It will alternate between positive and negative when k is odd or even. Notice this is an arithmetic series.