Pearson Algebra 2 Common Core, 2011
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Pearson Algebra 2 Common Core, 2011 View details
2. Arithmetic Sequences
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Exercise 1 Page 575

To write the formula for the term, you need to know the common difference and the first term of the sequence.

Practice makes perfect
To begin, let's observe the given terms in the sequence to determine the value of the first term as well as the common difference.
We can use this information to write an equation for the term of the sequence.

Writing the Equation

Explicit equations for the term of an arithmetic sequence follow a certain format.
In this form, is the first term in the sequence, is the common difference, and is the position of the desired term in the sequence. Using the common difference and the first term we can write and simplify the equation.

Solving for the Term

To find the value of the term, we substitute into this equation and simplify.
The term in the sequence is