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Q.

If the matrix  A=8-62-67-42-41 is a singular matrix then  λ=

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a

3

b

4

c

2

d

5

answer is A.

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Detailed Solution

A=8-62-67-42-41

|A|=0

⇒8(7λ−16)+6(−6λ+8)+2(24−14)=0

⇒56λ−128−36λ+48+48−28=0

⇒20λ−60=0

⇒λ=3

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