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Answer:

( 1, 2, 3 )T T   =   ( 1, 2, 3 )

Transposing twice gives you what you started with. This seems obvious right now, but later on when you are doing algebraic manipulation it might help to remember this.


Column Matrix Addition

addition of two column matrices and of two row matrices

A column matrix added to another column matrix of the same dimension results in a column matrix (of the same dimension). A similar statement is true for row matrices.

Addition is done by adding corresponding elements of the input matrices to produce each corresponding element of the output matrix.

( 42, -12 )T + ( 8, 24 )T = ( 50, 12 )T

( 32.98, -24.71, 9.392 )T + ( -32.98, +24.71, -9.392 )T = (0, 0, 0)T

( 9.2, -8.6, 3.21, 48.7 ) + ( -2.1, 4.3, 1.0, 2.3 ) = ( 7.1, -4.3, 4.21, 51.0 )

( 1, 2, 3 ) + ( 10, 20, 30 ) = ( 11, 22, 33 )

If a and b are matrices of the same type, then a + b = c means that each element ci = ai + bi


QUESTION 3:

Do the following problem:

( 2, -2 )T + ( 8,  6 )T =