Arithmetic
Arithmetic
Arithmetic
Example 1
Find the sum of the first five terms (S5) of the arithmetic sequence 1, 4, 7, 10, 13 …
Step 1. Determine the number of terms to add.
S5 = a1 + a2 + a3 + a4 + a5
Step 2. Add the terms.
S5 = 1 + 4 + 7 + 10 + 13
S5 = 35