Question: Given the matrix R = ( 2 1 1 3 ), i. show that R is non-singular. ii. find R-1 , the inverse of R.

Given the matrix R = ( 2 1 1 3 ),

i. show that R is non-singular.

ii. find R-1 , the inverse of R.

iii. show that RR-1 = I.

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