Linear transformation, T, such that: T:M_22 ([x_11 x_21 x_12 x_22])=[x_12−5x_21 −x_22−3x_21−x_11−2x_12+3x_21+4x_22−x_11−x_12+x_21+3x_22] What is the matrix that represents this M_22->M_22 transformation?

Spactapsula2l

Spactapsula2l

Answered question

2022-09-07

Linear transformation, T, such that:
T: M 22
( [ x 11 x 12 x 21 x 22 ] ) = [ x 12 5 x 21 x 22 x 11 2 x 12 + 3 x 21 + 4 x 22 3 x 21 x 11 x 12 + x 21 + 3 x 22 ]
What is the matrix that represents this M 22 -> M 22 transformation?
Is it:
[ 0 1 5 1 1 2 3 4 0 0 3 0 1 1 1 3 ]
If so, how could this be multiplied by a 2x2 matrix to give another 2x2 matrix. (2x2 matrices cannot multiply with 4x4 matrices).

Answer & Explanation

Peyton Atkins

Peyton Atkins

Beginner2022-09-08Added 13 answers

You'd have to write the matrix in column form ( x 11 x 12 x 21 x 22 ) . After that, the matrix you gave will work. No 2 × 2 matrix will multiply to produce that transformation since the top-left entry contains x 22 , which is impossible under matrix multiplication.

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