If 
and I is the identity matrix of order 3, show that A3 = pl + qA + rA2.
Given,
A
p
qA + r
= p
Hence,
p
qA + r
Hence proved.
20
If and I is the identity matrix of order 3, show that A3 = pl + qA + rA2.
Given,
A
pqA + r
= p
Hence,
pqA + r
Hence proved.