Algebra 1 : How to find the nth term of an arithmetic sequence
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Example Question #221 : Functions And Lines
The second term of an arithmetic sequence is 
The common difference between the terms is half that between the second and fourth terms - that is:
Subtract this common difference from the second term to get the first:
Example Question #222 : Functions And Lines
An arithmetic sequence is given by the formula 
You can either calculate the vaules of 
Example Question #11 : Arithmetic Series
Consider the following arithmetic sequence:
What is the 
A simple way to find the 
Here, 
Example Question #14 : How To Find The Nth Term Of An Arithmetic Sequence
What is the 20th term of 
Notice that every odd term is increasing at an increment of 
The even terms are 
The equation that represents the terms for this sequence is: 
Substitute 
The answer is:
Example Question #11 : How To Find The Nth Term Of An Arithmetic Sequence
What is the 11th term in the following sequence?
First we need to show how this sequence is changing. Let's call the first number
Ok, so we have established that the sequence is shrinking by 9 each time. So now we need to calculate out to the 11th term. Starting from the first term, we need to subtract 9 ten times to get to the 11th term. So that would look like this.
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