uch that ay 2. when i 10, when it 5...
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uch that ay 2. when i 10, when it 518 1 =lave such that ai; = det(adj (adj) is (where } represe then derledilata fractional part function) (b) 2/7 (d) none of these (C) 317 2

JEE/Engineering Exams
Maths
Solution
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Standard results ( rightarrow ) (1) ( A cdot operatorname{adj} A=|A| operatorname{In} ) (2) det ( (a d j A)=|A|^{n-1} ) (3) ( operatorname{det}(operatorname{adj}(a d j A))=|A|^{n^{2}-2 n+1}=|A| ) Heref ( =4) ) ( operatorname{det}(A)=|A|=begin{array}{c}text { product of diagonal elements } (text { since Ais a diagonal matix })end{array} )
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