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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).

6,2,(2)/(3),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).\newline6,2,23, 6,2, \frac{2}{3}, \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).\newline6,2,23, 6,2, \frac{2}{3}, \ldots \newlineFind the 66th term.\newlineAnswer:
  1. Identify Pattern: Identify the pattern in the sequence.\newlineThe sequence given is 6,2,23,6, 2, \frac{2}{3}, \ldots To find the pattern, we look at how each term is related to the previous one. We divide each term by 33 to get the next term.\newline6÷3=26 \div 3 = 2\newline2÷3=232 \div 3 = \frac{2}{3}\newlineThis is a geometric sequence with a common ratio of 13.\frac{1}{3}.
  2. Use Formula: Use the formula for the nnth term of a geometric sequence.\newlineThe nnth term of a geometric sequence is given by the formula:\newlinean=a1r(n1)a_n = a_1 \cdot r^{(n-1)}\newlinewhere ana_n is the nnth term, a1a_1 is the first term, rr is the common ratio, and nn is the term number.
  3. Plug in Values: Plug in the values to find the 66th term.\newlinea1=6a_1 = 6 (the first term)\newliner=13r = \frac{1}{3} (the common ratio)\newlinen=6n = 6 (we want to find the 66th term)\newlinea6=6×(13)61a_6 = 6 \times \left(\frac{1}{3}\right)^{6-1}\newlinea6=6×(13)5a_6 = 6 \times \left(\frac{1}{3}\right)^5
  4. Calculate 66th Term: Calculate the 66th term.\newlinea6=6×(1/3)5a_6 = 6 \times (1/3)^5\newlinea6=6×(1/243)a_6 = 6 \times (1/243)\newlinea6=6/243a_6 = 6/243\newlinea6=2/81a_6 = 2/81
  5. Convert to Decimal: Convert the fraction to a decimal and round to the nearest thousandth if necessary.\newline281\frac{2}{81} as a decimal is approximately 0.02470.0247\newlineRounded to the nearest thousandth, it is 0.0250.025.

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