Mathematics
Mathematics, 16.06.2021 15:50, alyssa32900

Cho ánh xạ tuyến tính 3 3 f : ℝ ℝ → và hai cơ sở của 3 ℝ : B b b n b = = = − = { 1 2 3 (1,3,3), ( ,6,5), (1,2,2)} , C c = − {c n c 1 2 3 = = = ( ), ( ), ( ) 2, 3,3 5, 1, 5 − + − − 1,0,1 } . Biết: 1 f b( ) ( 5,6,4) = − , 2 f b( ) ( 8,5,2) = − , 3 f b( ) ( 9, 2, 5) = − − − . a. Tìm ma trận 3 [ ] A f E = , từ đó suy ra biểu thức của 1 2 3 f x x x ( , , ). 2/2 b. Tìm ma trận [ ]B f . c. Từ [ ]B f , hãy tính ma trận [ ]C B f . d. Cho vector ( 2,3, ) x n = − , hãy tính [ ]B x và suy ra [ ( )]C f x .

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Cho ánh xạ tuyến tính 3 3 f : ℝ ℝ → và hai cơ sở của 3 ℝ : B b b n b = = = − = { 1 2 3 (1,3,3), ( ,6...

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