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CBSE Class 12-science Answered

if A is an invertible matrix of order 3 and IAI=5 then find the value of [adjA] 
Asked by niharikapabba2605 | 11 Aug, 2018, 01:28: AM
answered-by-expert Expert Answer
begin mathsize 16px style open vertical bar straight A close vertical bar equals 5
For space straight n cross times straight n space matrix
open vertical bar adj space straight A close vertical bar equals open vertical bar straight A close vertical bar to the power of straight n minus 1 end exponent equals 5 to the power of 3 minus 1 end exponent equals 25 end style
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