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Question

Given A=[2017]and I=[1001] and A2=9A+mI. Find m.


A

18

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B

-18

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C

14

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D

-14

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Solution

The correct option is D

-14


Given, A2=9A+mI
[2017][2017]=9[2017]+m[1001][40949]=[180963]+[m00m][40949]=[18+m0963+m]18+m=4m=14


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