यदि $A = \left[ {\begin{array}{*{20}{c}}0&1\\0&0\end{array}} \right]$और $AB = O$, तो $B =  $

यदि  $A = \left[ {\begin{array}{*{20}{c}}i&0\\0&i\end{array}} \right]$ ओर $B = \left[ {\begin{array}{*{20}{c}}0&{ – i}\\{ – i}&0\end{array}} \right]$  तो $(A + B)(A – B)$

यदि $A = \left( {\begin{array}{*{20}{c}}2&{ – 1}\\{ – 1}&2\end{array}} \right)$ और $I$, कोटि $2$ का इकाईआव्यूह हो, तो ${A^2}$ का मान होगा

यदि $P = \left[ {\begin{array}{*{20}{c}}1&2&3\\2&3&4\\3&4&5\end{array}} \right]\,\left[ {\begin{array}{*{20}{c}}{ – 1}&{ – 2}\\{ – 2}&0\\0&{ – 4}\end{array}} \right]$$\left[ {\begin{array}{*{20}{c}}{ – 4}&{ – 5}&{ – 6}\\0&0&1\end{array}} \right]$, तब ${P_{22}} = $

यदि $A = \left[ {\begin{array}{*{20}{c}}\lambda &1\\{ – 1}&{ – \lambda }\end{array}} \right]$, तो $\lambda $ के किस मान के लिये$\,{A^2} = 0$ है