Problem

أذا كان
\[
\begin{array}{l}
1=17 \\
2=33 \\
3=49 \\
4=65 \\
5=? ? ? ? ? ?
\end{array}
\]

Answer

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Answer

\(a_5 = 81\)

Steps

Step 1 ：\(a_n = 17 + 16(n-1)\)

Step 2 ：\(a_5 = 17 + 16(5-1)\)

Step 3 ：\(a_5 = 17 + 64\)

Step 4 ：\(a_5 = 81\)

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