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If A is a matrix such that A2+A+2I=O, then which of the following is/are true?

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Important Questions on Matrices

HARD
JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 20
If A= 3-342-340-11, then 
HARD
JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 21
If  1-tanθtanθ1 1tanθ-tanθ1-1=a-bba, then
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JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 22
If A-1=1-1203100-13 , then 
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JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 23
If A is an invertible matrix, then adjA-1 is equal to 
EASY
JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 24
If A and B are two invertible matrices of the same order, then adj AB is equal to 
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JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 25
If A , B and C are three square matrices of the same order, then AB=AC⇒B=C . Then 
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JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 26
If A and B are symmetric and commute, then which of the following is/are symmetric?
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JEE Main/Advance
IMPORTANT
Mathematics for Joint Entrance Examination JEE (Advanced) Algebra>Chapter 13 - Matrices>Exercises>Q 27
If A and B are square matrices of order 3 such that A3=8B3=8I and detAB-A-2B+2I ≠0 , then identify the correct statement (s) , where I is identity matrix of order 3.