### sequence and series

series is a sum of a sequence of terms. That is, a series is a list of numbers with addition operations between them.

What is sequence and series in math?
2,4,6,8,10….is an arithmetic sequence with the common difference 2. If the first term of an arithmetic sequence is a1 and the common difference is d, then the nth term of the sequence is given by: an=a1+(n−1)d. An arithmetic series is the sum of an arithmetic sequence.

What is difference between sequence and series?
The list of numbers written in a definite order is called a sequence. The sum of terms of an infinite sequence is called an infinite series. A sequence can be defined as a function whose domain is the set of Natural numbers. Thereforesequence is an ordered list of numbers and series is the sum of a list of numbers.

What is sequence and example?
Definition and Examples of Sequences. A sequence is an ordered list of numbers . The three dots mean to continue forward in the pattern established. Each number in the sequence is called a term. In the sequence 1, 3, 5, 7, 9, …, 1 is the first term, 3 is the second term, 5 is the third term, and so on.

What is the formula of sequence?
An arithmetic sequence can also be defined recursively by the formulas a1 = c, an+1 = an + d, in which d is again the common difference between consecutive terms, and c is a constant. The sum of an infinite arithmetic sequence is either ∞, if d > 0, or - ∞, if d < 0.

How do you find the d value of a arithmetic sequence?
Since we want to find the 125th term, the “n” value would be n = 125. The following are the known values we will plug into the formula: The missing term in thesequence is calculated as, Example 3: If one term in the arithmetic sequence is a21 = –17 and the common difference is d = –3.
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