IDNLearn.com provides a reliable platform for finding accurate and timely answers. Discover detailed answers to your questions with our extensive database of expert knowledge.

Complete the table below for the first 10 terms of the sequence whose terms are given by [tex]\( a_1 = 9 \)[/tex] and [tex]\( a_{n+1} = \sqrt{2 + \sqrt{a_n}} \)[/tex].
(Round to four decimal places as needed.)

[tex]\[
\begin{tabular}{|c|c|}
\hline
n & u(n) = a_n \\
\hline
1 & 9 \\
2 & \square \\
3 & \square \\
4 & \square \\
5 & \square \\
6 & \square \\
7 & \square \\
8 & \square \\
9 & \square \\
10 & \square \\
\hline
\end{tabular}
\][/tex]


Sagot :

To complete the table for the first 10 terms of the sequence defined by [tex]\(a_1 = 9\)[/tex] and [tex]\(a_{n+1} = \sqrt{2 + \sqrt{a_n}}\)[/tex], we need to calculate each term:

1. [tex]\(a_1 = 9\)[/tex]
2. To find [tex]\(a_2\)[/tex]:
[tex]\[ a_2 = \sqrt{2 + \sqrt{a_1}} = \sqrt{2 + \sqrt{9}} = \sqrt{2 + 3} = \sqrt{5} \approx 2.2361 \][/tex]
3. To find [tex]\(a_3\)[/tex]:
[tex]\[ a_3 = \sqrt{2 + \sqrt{a_2}} = \sqrt{2 + \sqrt{2.2361}} \approx \sqrt{2 + 1.4954} \approx \sqrt{3.4954} \approx 1.8696 \][/tex]
4. To find [tex]\(a_4\)[/tex]:
[tex]\[ a_4 = \sqrt{2 + \sqrt{a_3}} = \sqrt{2 + \sqrt{1.8696}} \approx \sqrt{2 + 1.3671} \approx \sqrt{3.3671} \approx 1.8350 \][/tex]
5. To find [tex]\(a_5\)[/tex]:
[tex]\[ a_5 = \sqrt{2 + \sqrt{a_4}} = \sqrt{2 + \sqrt{1.8350}} \approx \sqrt{2 + 1.3548} \approx \sqrt{3.3548} \approx 1.8316 \][/tex]
6. To find [tex]\(a_6\)[/tex]:
[tex]\[ a_6 = \sqrt{2 + \sqrt{a_5}} = \sqrt{2 + \sqrt{1.8316}} \approx \sqrt{2 + 1.3535} \approx \sqrt{3.3535} \approx 1.8312 \][/tex]
7. To find [tex]\(a_7\)[/tex]:
[tex]\[ a_7 = \sqrt{2 + \sqrt{a_6}} = \sqrt{2 + \sqrt{1.8312}} \approx \sqrt{2 + 1.3533} \approx \sqrt{3.3533} \approx 1.8312 \][/tex]
8. To find [tex]\(a_8\)[/tex]:
[tex]\[ a_8 = \sqrt{2 + \sqrt{a_7}} = \sqrt{2 + \sqrt{1.8312}} \approx \sqrt{2 + 1.3533} \approx \sqrt{3.3533} \approx 1.8312 \][/tex]
9. To find [tex]\(a_9\)[/tex]:
[tex]\[ a_9 = \sqrt{2 + \sqrt{a_8}} = \sqrt{2 + \sqrt{1.8312}} \approx \sqrt{2 + 1.3533} \approx \sqrt{3.3533} \approx 1.8312 \][/tex]
10. To find [tex]\(a_{10}\)[/tex]:
[tex]\[ a_{10} = \sqrt{2 + \sqrt{a_9}} = \sqrt{2 + \sqrt{1.8312}} \approx \sqrt{2 + 1.3533} \approx \sqrt{3.3533} \approx 1.8312 \][/tex]

Thus, the completed table is:

[tex]\[ \begin{array}{|c|c|} \hline n & a_n\\ \hline 1 & 9 \\ 2 & 2.2361 \\ 3 & 1.8696 \\ 4 & 1.8350 \\ 5 & 1.8316 \\ 6 & 1.8312 \\ 7 & 1.8312 \\ 8 & 1.8312 \\ 9 & 1.8312 \\ 10 & 1.8312 \\ \hline \end{array} \][/tex]