JEE MAIN - Mathematics Hindi (2021 - 25th July Morning Shift - No. 22)

चलिए $$S = \left\{ {n \in N\left| {{{\left( {\matrix{ 0 & i \cr 1 & 0 \cr } } \right)}^n}\left( {\matrix{ a & b \cr c & d \cr } } \right) = \left( {\matrix{ a & b \cr c & d \cr } } \right)\forall a,b,c,d \in R} \right.} \right\}$$, जहां i = $$\sqrt { - 1} $$। तब सेट S में 2-अंकीय संख्याओं की संख्या _____________.
Answer
11

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