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Given the matrices: J= 26   18          K= 43   21     34   19          ...

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schooledmom

Posted May 9, 2013 at 4:31 PM via web

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Given the matrices:

J= 26   18          K= 43   21

    34   19                26   20

    61   23                33   92

 

What is J+K?

What is 4J-2K?

   

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pramodpandey | College Teacher

Posted May 9, 2013 at 4:47 PM (Answer #1)

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We  have given J and K. We wish to find  J+K , 4J-2K

    34   19                26   20

    61   23                33   92

`J=[[26,18],[34,19],[61,23]]`    `K=[[43,21],[26,20],[33,92]]`

`J+K=[[26+43,18+21],[34+26,19+20],[61+33,23+92]]`

`=[[69,39],[60,39],[94,115]]`

`4J-2K=[[104-86,72-42],[136-52,76-40],[244-66,92-184]]`

`=[[18,30],[84,36],[178,-92]]`

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