Question
Let $$A = \left( {\matrix{ {1 + i} & 1 \cr { - i} & 0 \cr } } \right)$ where $i = \sqrt { - 1} $. Then, the number of elements in the set { n $\in$$ {1, 2, ......, 100} : An = A } is ____________.
Correct Answer
25
Let $$A = \left( {\matrix{ {1 + i} & 1 \cr { - i} & 0 \cr } } \right)$ where $i = \sqrt { - 1} $. Then, the number of elements in the set { n $\in$$ {1, 2, ......, 100} : An = A } is ____________.