A=left[begin{array}{lll}1 & 0 & 1 0 & 1 & 1 | vedclass

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(B) दिया गया है,$A=\left[\begin{array}{lll}1 & 0 & 1 \ 0 & 1 & 1 \ 0 & 1 & 0\end{array}ight]$.सबसे पहले,$A^2$ की गणना करें:$A^2 = \left[\begin{arr

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$-A^{-1}$

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(B) दिया गया है,$A=\left[\begin{array}{lll}1 & 0 & 1 \ 0 & 1 & 1 \ 0 & 1 & 0\end{array}ight]$.सबसे पहले,$A^2$ की गणना करें:$A^2 = \left[\begin{array}{lll}1 & 0 & 1 \ 0 & 1 & 1 \ 0 & 1 & 0\end{array}ight] \left[\begin{array}{lll}1 & 0 & 1 \ 0 & 1 & 1 \ 0 & 1 & 0\end{array}ight] = \left[\begin{array}{lll}1 & 1 & 1 \ 0 & 2 & 1 \ 0 & 1 & 1\end{array}ight]$.अब,$A^2 - 2A$ की गणना करें:$A^2 - 2A = \left[\begin{array}{lll}1 & 1 & 1 \ 0 & 2 & 1 \ 0 & 1 & 1\end{array}ight] - 2\left[\begin{array}{lll}1 & 0 & 1 \ 0 & 1 & 1 \ 0 & 1 & 0\end{array}ight] = \left[\begin{array}{lll}1 & 1 & 1 \ 0 & 2 & 1 \ 0 & 1 & 1\end{array}ight] - \left[\begin{array}{lll}2 & 0 & 2 \ 0 & 2 & 2 \ 0 & 2 & 0\end{array}ight] = \left[\begin{array}{rrr}-1 & 1 & -1 \ 0 & 0 & -1 \ 0 & -1 & 1\end{array}ight] \dots (i)$.आगे,$A^{-1}$ ज्ञात करें। सारणिक $|A| = 1(0-1) - 0 + 1(0) = -1$.सहखंड आव्यूह $C$ है:$C_{11} = -1, C_{12} = 0, C_{13} = 0$$C_{21} = 1, C_{22} = 0, C_{23} = -1$$C_{31} = -1, C_{32} = -1, C_{33} = 1$$Adj(A) = C^T = \left[\begin{array}{rrr}-1 & 1 & -1 \ 0 & 0 & -1 \ 0 & -1 & 1\end{array}ight]$.चूंकि $A^{-1} = \frac{1}{|A|} Adj(A) = \frac{1}{-1} \left[\begin{array}{rrr}-1 & 1 & -1 \ 0 & 0 & -1 \ 0 & -1 & 1\end{array}ight] = -\left[\begin{array}{rrr}-1 & 1 & -1 \ 0 & 0 & -1 \ 0 & -1 & 1\end{array}ight]$.इसे $(i)$ के साथ तुलना करने पर,हम पाते हैं कि $A^2 - 2A = -A^{-1}$.

$A=\left[\begin{array}{lll}1 & 0 & 1 \\ 0 & 1 & 1 \\ 0 & 1 & 0\end{array}\right] \Rightarrow A^2-2 A=$

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यदि $\left[\begin{array}{ccc}0 & 2 & a \\ b & 0 & 4 \\ -3 & c & 0\end{array}\right]$ एक विषम-सममित आव्यूह (skew-symmetric matrix) है,तो $\left[\begin{array}{cc}a & b \\ b & a\end{array}\right]\left[\begin{array}{cc}b & c \\ c & b\end{array}\right]=$

$\left|\begin{array}{ll}2 & 1 \\ 3 & 1\end{array}\right|+\left|\begin{array}{cc}1 & 1/3 \\ 3 & 1\end{array}\right|+\left|\begin{array}{cc}1/2 & 1/9 \\ 3 & 1\end{array}\right|+\left|\begin{array}{cc}1/4 & 1/27 \\ 3 & 1\end{array}\right|+\ldots \infty=$

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