Inferring A General Term From A Sequence

Does it?In summary, the given sequence can be written as (-1)^{n+1} \frac{3}{2^{n-1}}, where n represents the position of the term in the sequence. The alternating sign and the powers of two account for each term, except for 3, which remains constant.
  • #1
Bashyboy
1,421
5

Homework Statement


3, -3/2, 3/4, -3/8,...


Homework Equations





The Attempt at a Solution


I began to write, [itex](-1)^{n+1} \frac{3}{...}[/itex], but I began to despair once I came upon the denominator. I know that every term's, except 3, denominator can be written as a power of two, but I wasn't sure on how to account for the 3.
 
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  • #2
Bashyboy said:

Homework Statement


3, -3/2, 3/4, -3/8,...


Homework Equations





The Attempt at a Solution


I began to write, [itex](-1)^{n+1} \frac{3}{...}[/itex], but I began to despair once I came upon the denominator. I know that every term's, except 3, denominator can be written as a power of two, but I wasn't sure on how to account for the 3.

I don't see your problem. You have the alternating sign, the 3, and powers of two. Put them all in your answer.
 
  • #3
So, would it be [itex](-1)^{n+1} \frac{3}{2^{n-1}}[/itex]
 
  • #4
Bashyboy said:
So, would it be [itex](-1)^{n+1} \frac{3}{2^{n-1}}[/itex]

All you have to do is see if it gives your answers for n = 1,2,3,4.
 

FAQ: Inferring A General Term From A Sequence

What is "Inferring A General Term From A Sequence"?

"Inferring A General Term From A Sequence" is the process of identifying a pattern or rule in a given sequence of numbers or objects in order to determine a general term or formula that can be used to find any term in the sequence.

Why is it important to infer a general term from a sequence?

Infering a general term from a sequence allows us to make predictions about future terms in the sequence and to understand the underlying pattern or rule that governs the sequence. This can be useful in various fields of science and mathematics, such as data analysis, problem-solving, and creating models.

What are some common strategies for inferring a general term from a sequence?

Some common strategies for inferring a general term from a sequence include identifying the differences or ratios between consecutive terms, looking for recurring patterns or cycles, and using algebraic methods such as substitution and solving equations.

Can a general term be inferred from any sequence?

No, not all sequences have a predictable pattern or rule that can be used to determine a general term. Some sequences may be random or have multiple possible patterns, making it difficult to infer a general term.

How can inferring a general term from a sequence be applied in real-life situations?

Inferring a general term from a sequence can be applied in various real-life situations, such as predicting stock market trends, analyzing weather patterns, and understanding population growth. It is also commonly used in fields such as computer programming, cryptography, and physics.

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