Question

If you save one dollar on January 1, two dollars on January 2, three dollars on January 3, and continue this pattern for one year (not a leap year), what will be the value of your entire savings, in dollars, at the end of that one year? Express your answer as a decimal, without using commas.

Answer 1

first write an arithmetic sequence with the first term 1, n = 365, and d = 1 (since the dollar amount is increasing by 1 each day) then find the sum