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Example 19 - Find minor of element 6 in the determinant - Finding Minors and cofactors

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Example 19 Find the minor of element 6 in the determinant Δ = 1﷮2﷮3﷮4﷮5﷮𝟔﷮7﷮8﷮9﷯﷯ Since 6 lies in the second row and third column, i.e. a23 = 6 Minor of a23 = M23 = 1﷮2﷮3﷮4﷮5﷮𝟔﷮7﷮8﷮9﷯﷯ = 1﷮2﷮7﷮8﷯﷯ = 8 – 14 = – 6 Thus, minor of element 6 is −6.

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.