Arithmetic Sequences

We learned about arithemetic sequences. Arithmetic sequences are sequences of numbers where there is a common difference between each number such that a number is is being added to each number to get the next number in the sequence. There are both explicit and sum formulas. Explicit formulas are used to find a single number in a sequence when the first number and the change or common difference between each number is known. The sum formulas are used to find the sum of the whole arithmetic sequence when the first and last number and the amount of numbers are known. The equations and examples will be in a picture below.