# Example 7 - Chapter 3 Class 12 Matrices

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Example 7 If A = [ 8(1&2&3@2&3&1)] and B = [ 8(3& 1&3@ 1&0&2)] then find 2A B. Finding 2A 2A = 2 [ 8(1&2&3@2&3&1)] = [ 8(2 1&2 2&2 3@2 2&2 3&2 1)] = [ 8(2&4&6@4&6&2)] Now, finding 2A B 2A B = [ 8(2&4&6@4&6&2)] [ 8(3& 1&3@ 1&0&2)] = [ 8(2 3&4 ( 1)&6 3@4 ( 1)&6 0&2 2)] = [ 8( 1&4+1&3@4+1&6&0)]

Examples

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Example 5 Important

Example 6

Example 7 You are here

Example 8

Example 9

Example 10

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Example 12

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Example 14

Example 15

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Example 18 Important

Example 19

Example 20 Important

Example 21

Example 22 Important

Example 23 Deleted for CBSE Board 2021 Exams only

Example 24 Important Deleted for CBSE Board 2021 Exams only

Example 25 Important Deleted for CBSE Board 2021 Exams only

Example 26 Important

Example 27 Important

Example 28

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.