CBSE Class 12 Math 2019 All India Set 1 Solved Paper

Question : 1 of 29

Marks: +1, -0

{\A}

is a square matrix of order 3 with

| {\A}|=4

, then write the value of

|-2 {\A}|

Solution:

Given,
Order of the square matrix,

n=3

| {\A}|=4

|-2 {\A}|=(-2)^n| {\A}|

|-2 {\A}|=(-2)^3 × 4

|-2 {\A}|=-32

Therefore, the value of

|-2 {\A}|

is -32 .

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