Let A=4x4 matrix: [3,2,10,-6 1,0,2,-4 0,1,2,3 1,4,10,8], let b=4x1 matrix: [-1 3 -1 4] Is b in the range of linear transformation x -> Ax?

Paloma Sanford

Paloma Sanford

Answered question

2022-10-13

Let A = 4 × 4 matrix: [ 3 2 10 6 1 0 2 4 0 1 2 3 1 4 10 8 ] , let b = 4 × 1 matrix: [ 1 3 1 4 ]
Is b in the range of linear transformation x A x?

Answer & Explanation

faux0101d

faux0101d

Beginner2022-10-14Added 21 answers

Check to see if the columns of A span R 4 .
Valery Cook

Valery Cook

Beginner2022-10-15Added 3 answers

think of A x as a linear combination of the 4 columns of A x 1 C 1 + . . . x 4 C 4 where C 1 , . . . , C 4 are the columns of A. So now the question is whether b can be written as such a combination, which can be done as a gaussian elimination problem solving for x 1 , . . . , x 4 .

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