Math Problem Statement
cho ma trận A = [1 2; -1 3]. Tìm ma trận X sao cho A.X = I2 = [1 0; 0 1] ( X thỏa A.X = I hoặc X.A = I được gọi là ma trận nghịch đảo của A)
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Algebra
Matrix Inversion
Determinants
Formulas
Inverse matrix formula for 2x2 matrix: A^{-1} = (1/det(A)) * adj(A)
Determinant of 2x2 matrix: det(A) = ad - bc
Theorems
Inverse Matrix Theorem
Suitable Grade Level
Grades 10-12
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