Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

The first three terms of a sequence are given. Write your answer as a decimal or whole number. Round to the nearest thousandth (if necessary).

9,6,4,dots
Find the 6th term.
Answer:

The first three terms of a sequence are given. Write your answer as a decimal or whole number. Round to the nearest thousandth (if necessary).\newline9,6,4, 9,6,4, \ldots \newlineFind the 66th term.\newlineAnswer:

Full solution

Q. The first three terms of a sequence are given. Write your answer as a decimal or whole number. Round to the nearest thousandth (if necessary).\newline9,6,4, 9,6,4, \ldots \newlineFind the 66th term.\newlineAnswer:
  1. Identify Pattern: Identify the pattern in the sequence.\newlineThe given sequence is 9,6,4,9, 6, 4, \ldots\newlineTo find the pattern, we look at the differences between consecutive terms.\newlineThe difference between the first and second term is 69=36 - 9 = -3.\newlineThe difference between the second and third term is 46=24 - 6 = -2.\newlineThe differences are not constant, so this is not an arithmetic sequence.\newlineWe need to look for another type of pattern, such as a geometric sequence or a sequence with a varying difference.
  2. Check Geometric Sequence: Check for a geometric sequence.\newlineA geometric sequence is one where each term after the first is found by multiplying the previous term by a constant called the common ratio rr.\newlineTo find the common ratio, we divide the second term by the first term and the third term by the second term.\newlineThe common ratio between the second and first term is 69=23\frac{6}{9} = \frac{2}{3}.\newlineThe common ratio between the third and second term is 46=23\frac{4}{6} = \frac{2}{3}.\newlineSince the common ratio is the same for these terms, we can conclude that this is a geometric sequence with a common ratio of 23\frac{2}{3}.
  3. Use nth Term Formula: Use the formula for the nth term of a geometric sequence to find the 66th term.\newlineThe formula for the nth term ana_n of a geometric sequence is an=a1r(n1)a_n = a_1 \cdot r^{(n-1)}, where a1a_1 is the first term and rr is the common ratio.\newlineThe first term a1a_1 is 99, the common ratio rr is 23\frac{2}{3}, and we want to find the 66th term n=6n=6.\newlineSo, a6=9(23)61=9(23)5a_6 = 9 \cdot \left(\frac{2}{3}\right)^{6-1} = 9 \cdot \left(\frac{2}{3}\right)^5.
  4. Calculate 66th Term: Calculate the 66th term.\newlinea6=9×(23)5a_6 = 9 \times \left(\frac{2}{3}\right)^5\newlinea6=9×(32243)a_6 = 9 \times \left(\frac{32}{243}\right) (since 25=322^5 = 32 and 35=2433^5 = 243)\newlinea6=288243a_6 = \frac{288}{243}\newlinea61.185a_6 \approx 1.185\newlineSince we need to round to the nearest thousandth, the 66th term is approximately 1.1851.185.

More problems from Powers with decimal bases

QuestionGet tutor helpright-arrow

Posted 7 months ago

QuestionGet tutor helpright-arrow

Posted 10 months ago