Math Problem Statement

Find the formula for a for the nth term of the following sequence 4/7, 5/8, 6/9, … assume the series begins at n=1

Solution

The given sequence is:

47,58,69,\frac{4}{7}, \frac{5}{8}, \frac{6}{9}, \dots

We can observe the general pattern of both the numerator and denominator:

  1. Numerator: The numerators are 4,5,6,4, 5, 6, \dots, which follow the pattern 4+(n1)4 + (n-1). This simplifies to 3+n3 + n.

  2. Denominator: The denominators are 7,8,9,7, 8, 9, \dots, which follow the pattern 7+(n1)7 + (n-1). This simplifies to 6+n6 + n.

Thus, the nth term of the sequence is:

an=3+n6+na_n = \frac{3 + n}{6 + n}

This is the formula for the nth term of the sequence.


Would you like further details or have any questions about this? Here are some related questions you might find useful:

  1. How do I find the nth term of a sequence where the terms increase by a constant amount?
  2. How can I determine if a sequence is arithmetic or geometric?
  3. How can I find the sum of the first n terms of an arithmetic sequence?
  4. How do I simplify fractions involving polynomials?
  5. Can this type of sequence have a limit as n approaches infinity?

Tip: To identify patterns in sequences, look at how the numerators and denominators change separately, then try to express them in terms of nn.

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Math Problem Analysis

Mathematical Concepts

Sequences
Algebra

Formulas

a_n = (3 + n) / (6 + n)

Theorems

Pattern recognition in sequences

Suitable Grade Level

Grades 7-9