To compute the first five partial sums of the arithmetic series given by ( a_n = -5(n - 1) + 8 ), you can use a spreadsheet like Microsoft Excel or google Sheets. First, generate the first five terms of the series by substituting ( n ) values from 1 to 5 into the formula. Then, create a column to calculate the partial sums by adding each term cumulatively. Finally, use a formula to sum the terms and display the results in another column.
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