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Q.

 Let P be a matrix satisfying P2-3=-11-6 and P22-3=-7-12 , then which of the following is/are INCORRECT? 

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a

 Sum of all elements of P=5

b

P 32= 67

c

P is a nil-potent matrix.

d

 Let aij denote the elements of matrix P . Then, a11×a22=-2

answer is A, D.

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Detailed Solution

Let P=abcd;P23=1162a3b=11 Also P116=71211c6d=1211a6d=7a=1,b=3,c=0,d=2

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 Let P be a matrix satisfying P2-3=-11-6 and P22-3=-7-12 , then which of the following is/are INCORRECT?