# 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 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 17

Example 18 Important

Example 19 Important

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Example 21

Example 22 Important

Example 23

Example 24

Example 25

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Example 27 Important

Example 28 Important

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.