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JEE Advanced 2019 Paper 1

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Question : 48

Total: 54

Let M=[

0	1	a
1	2	3
3	b	1

−1	1	−1
8	−6	2
−5	3	−1

] where a and b are real numbers.Which of the following options is/are correct?

a+b=3
det(adjM2)=81
(adjM−1)+adjM−1=−M
If
M=[
α
β
γ
]=[
1
2
3
]
,then α−β+γ=3

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