Question:

If \(P=\begin{bmatrix}1&0\\ \frac12&1\end{bmatrix}\), then \(P^{50}\) is :

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Compute \(P^2,P^3\) to spot \(P^n=\begin{bmatrix}1&0\\ n/2&1\end{bmatrix}\).
Updated On: Nov 4, 2026
  • \(\begin{bmatrix}1&0\\ 25&1\end{bmatrix}\)
  • \(\begin{bmatrix}1&50\\ 0&1\end{bmatrix}\)
  • \(\begin{bmatrix}1&25\\ 0&1\end{bmatrix}\)
  • \(\begin{bmatrix}1&0\\ 50&1\end{bmatrix}\)
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The Correct Option is A

Solution and Explanation

\(P^2=\begin{bmatrix}1&0\\ 1&1\end{bmatrix}\), \(P^3=\begin{bmatrix}1&0\\ \frac32&1\end{bmatrix}\). By induction \(P^n=\begin{bmatrix}1&0\\ \frac n2&1\end{bmatrix}\).
For \(n=50\): \(P^{50}=\begin{bmatrix}1&0\\ 25&1\end{bmatrix}\).
Answer: (1) \(\begin{bmatrix}1&0\\ 25&1\end{bmatrix}\)
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