Given A=[010100001]
Now A2=[010100001][010100001]=[100010001]=I
i.e. A98=I;A49=A
∴B0=A98+2A49=I+2A=[120210003]
Given Bn=adj(Bn−1)
∴B4=adj(B3)=adj(adjB2)=adj(adj(adjB1))
=adj(adj(adj(adjB0)))
∴∣B4∣=∣B0∣24=∣B0∣16
Now ∣B0∣=[120210003]=−9
Hence, ∣B4∣=∣B0∣16=916=332