ICSE Class 10 Answered
ch matrices
![question image](http://images.topperlearning.com/topper/new-ate/top_mob15860974699430078729fd98894-c88d-4780-a3e8-7afcf10eb873.jpg)
Asked by nilesh.dhote74 | 05 Apr, 2020, 20:07: PM
AB=I
So
B=A-1
Finding A-1
![straight A equals open square brackets table row 1 2 row 1 3 end table close square brackets
let
open square brackets table row 1 2 row 1 3 end table close square brackets straight B equals open square brackets table row 1 0 row 0 1 end table close square brackets
straight R subscript 2 rightwards arrow straight R subscript 2 minus straight R subscript 1
open square brackets table row 1 2 row 0 1 end table close square brackets straight B equals open square brackets table row 1 0 row cell negative 1 end cell 1 end table close square brackets
straight R subscript 1 rightwards arrow straight R subscript 1 minus 2 straight R subscript 2
open square brackets table row 1 0 row 0 1 end table close square brackets straight B equals open square brackets table row 3 cell negative 2 end cell row cell negative 1 end cell 1 end table close square brackets
straight B equals open square brackets table row 3 cell negative 2 end cell row cell negative 1 end cell 1 end table close square brackets](https://images.topperlearning.com/topper/tinymce/cache/b6b68aecb154aaa0472f9b6b7398e28b.png)
Answered by Arun | 06 Apr, 2020, 10:16: AM
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