[গণিত] এবং ( [গণিত] = [গণিত] ) হলে, AB এর মাन হবে
ক. [গণিত]
খ. [গণিত]
গ. [গণিত]
ঘ. [গণিত]
উত্তর: [গণিত]
ব্যাখ্যা: $ [গণিত] = [গণিত] [ [গণিত] 1 & [গণিত] - [গণিত] & 1 [গণিত] ] [গণিত] [ [গণিত] & -1 -1 & - [গণিত] ] = [গণিত] [ [গণিত] - [গণিত] & -1- [গণিত] 2 - [গণিত] 2-1 & [গণিত] - [গণিত] ]= [গণিত] [ [গণিত] 0 & -1+1 1-1 & 0 [গণিত] ] = [গণিত] [ [গণিত] 0 & 0 0 & 0 [গণিত] ]$
HSC Higher Math 1st Paper Chapter 1: ম্যাট্রিকস ও নির্ণায়ক MCQ — Prosthuti প্রশ্নব্যাংক
HSC · Higher Math 1st Paper · Chapter 1: ম্যাট্রিকস ও নির্ণায়ক · MCQ
\mathbf{A}=\left[\[\begin{array}{cc}1 & i \\ -\mathbf{i} & 1\end{array}\]\right], B=\left[\[\begin{array}{cc}\mathbf{i} & -1 \\ -1 & -\mathrm{i}\end{array}\]\right]এবং ( \mathbf{i}=\sqrt{-1}\) হলে, AB এর মাन হবে
- ক.\left[\[\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\]\right]
- খ.\left[\[\begin{array}{ll}0 & 0 \\ 0 & 0\end{array}\]\right]
- গ.\left[\[\begin{array}{ll}i & 0 \\ 0 & i\end{array}\]\right]
- ঘ.\left[\[\begin{array}{ll}\mathrm{i} & 1 \\ 1 & \mathrm{i}\end{array}\]\right]
উত্তর
\left[\[\begin{array}{ll}0 & 0 \\ 0 & 0\end{array}\]\right]