Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFR2 → R2 - R1 প্রয়োগ করে পাই
R3 → R3 - R1 প্রয়োগ করে পাই
এখন, a11 থেকে বিস্তার করে পাই।
= (m - l)(n - l)(n + l - m - l)
= (m - l)(n - l)(n - m)
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