Find the sum of an arithmetic series
Year 11 maths · Fieldbook Learning
Name ______________________ Date __________
Add the first and last term, multiply by the number of terms, and halve it.
- Find the sum of the first 7 terms of the arithmetic sequence −5, −2, 1, …
- Find the sum of the first 10 terms of the arithmetic sequence −14, −11, −8, …
- Find the sum of the first 7 terms of the arithmetic sequence −15, −6, 3, …
- Find the sum of the first 10 terms of the arithmetic sequence −3, 1, 5, …
- Find the sum of the first 10 terms of the arithmetic sequence 6, −1, −8, …
- Find the sum of the first 8 terms of the arithmetic sequence 7, 11, 15, …
- Find the sum of the first 6 terms of the arithmetic sequence −14, −15, −16, …
- Find the sum of the first 6 terms of the arithmetic sequence 13, 12, 11, …
- Find the sum of the first 10 terms of the arithmetic sequence −3, −6, −9, …
- Find the sum of the first 17 terms of the arithmetic sequence 7, 15, 23, …
- Find the sum of the first 18 terms of the arithmetic sequence 9, 11, 13, …
- Find the sum of the first 11 terms of the arithmetic sequence 3, 10, 17, …
- Find the sum of the first 21 terms of the arithmetic sequence 5, 4, 3, …
- Find the sum of the first 11 terms of the arithmetic sequence −9, −1, 7, …
- Find the sum of the first 20 terms of the arithmetic sequence 10, 1, −8, …
- Find the sum of the first 21 terms of the arithmetic sequence −5, −7, −9, …
- Find the sum of the first 38 terms of the arithmetic sequence −5, −7, −9, …
- Find the sum of the first 24 terms of the arithmetic sequence 6, 11, 16, …
- Find the sum of the first 29 terms of the arithmetic sequence 1, −6, −13, …
- Find the sum of the first 31 terms of the arithmetic sequence −1, −2, −3, …