Precalculus : Terms in a Series

Example Questions

Example Question #1 : Finding Terms In A Series

Consider the sequence: What is the fifteenth term in the sequence?     Explanation:

The sequence can be described by the equation , where is the term in the sequence.

For the 15th term, .    Example Question #22 : Sequences And Series

What is the sum of the first terms of an arithmetic series if the first term is , and the last term is ?      Explanation:

Write the formula to find the arithmetic sum of a series where is the number of terms, is the first term, and is the last term. Substitute the given values and solve for the sum. Example Question #1 : Terms In A Series

Given the terms of the sequence , what are the next two terms after ?      Explanation:

The next two terms are and . This is the Fibonacci sequence where you start off with the terms and , and the next term is the sum of two previous terms. So then       and so on.

Example Question #1 : Terms In A Series

What is the fifth term of the series       Explanation:

Let's try to see if this series is a geometric series.

We can divide adjacent terms to try and discover a multiplicative factor.

Doing this it seems the series proceeds with a common multiple of between each term.

Rewriting the series we get, .

When .

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