WBJEE · Maths · Matrices
If \(A=\left(\begin{array}{ll}1 & 1 \\ 0 & i\end{array}\right)\) and \(A^{2018}=\left(\begin{array}{ll}a & b \\ c & d\end{array}\right)\), then \((a+d)\) equals
- A \(1+\mathrm{i}\)
- B 0
- C 2
- D 2018
Answer & Solution
Correct Answer
(B) 0
Step-by-step Solution
Detailed explanation
\(A^2=\left(\begin{array}{cc}1 & 1+i \\ 0 & -1\end{array}\right), A^3=\left(\begin{array}{cc}1 & i \\ 0 & -i\end{array}\right), A^4=I\)…
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