Question
Describe the pattern, write the next term, and write a rule for the \( n \)th term of the sequens \( \frac{2}{3}, \frac{2}{6}, \frac{2}{9}, \frac{2}{12}, \ldots \) The pattern is The next term is The \( n \)th term is \( a_{n}= \)
Ask by Gordon Potter. in the United States
Mar 10,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
**Pattern:** The numerator is always 2, and the denominator increases by 3 each time.
**Next Term:** \(\frac{2}{15}\)
**Rule for the \(n\)th Term:** \(a_{n} = \frac{2}{3n}\)
Solution
**Step 1: Identify the pattern**
The sequence is given by
\[
\frac{2}{3}, \quad \frac{2}{6}, \quad \frac{2}{9}, \quad \frac{2}{12}, \quad \ldots
\]
The numerator is always \(2\). The denominator starts at \(3\) and increases by \(3\) each time. This means that the denominator is a multiple of \(3\).
**Step 2: Write the next term**
Since the last term provided is \(\frac{2}{12}\) and the denominator increases by \(3\), the next denominator is
\[
12 + 3 = 15.
\]
Thus, the next term is
\[
\frac{2}{15}.
\]
**Step 3: Write the rule for the \(n\)th term**
In the sequence, the denominator for the \(n\)th term is \(3n\) (since for \(n=1\) we have \(3\), for \(n=2\) we have \(6\), and so on), and the numerator is constant \(2\). Hence, the rule for the \(n\)th term is
\[
a_{n} = \frac{2}{3n}.
\]
**Summary**
The pattern is: the numerator is constant at \(2\) and the denominator increases by \(3\) with each term.
The next term is: \(\frac{2}{15}\).
The \(n\)th term is:
\[
a_{n} = \frac{2}{3n}.
\]
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Mind Expander
The pattern is that the numerators remain constant at 2, while the denominators increase by 3 with each term: 3, 6, 9, 12... This means the series is formed by fractions with a common numerator and increasing multiples of 3 in the denominator. The next term is \(\frac{2}{15}\). The \( n \)th term is \( a_{n} = \frac{2}{3n} \), where \( n \) is the position of the term in the sequence. For example, when \( n = 1 \), \( a_{1} = \frac{2}{3} \); when \( n = 2 \), \( a_{2} = \frac{2}{6} \), and so forth!