![]() With Cuemath, find solutions in simple and easy steps. Use our free online calculator to solve challenging questions. Example 2: Find the sum of the first 40 terms of the arithmetic sequence 2, 5, 8, 11. Example 1: Find the sum of the first 20 terms of the arithmetic series if a 1 5 and a 20 62. Sum of arithmetic terms = n/2, where 'a' is the first term, 'd' is the common difference between two numbers, and 'n' is the number of terms. The sum of the first n terms of an arithmetic sequence is called an arithmetic series. Lets try it Find the sum of the first 6 terms of the.
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