a. Not every linear transformation from Rn to Rm is a matrix transformation.
b. The columns of the standard matrix for a linear transformation from Rn to Rm are the images of the columns of the n x n identity matrix.
c. The standard matrix of a linear transformation from R2 to R2 that reflects points through the horizontal axis, the vertical axis, or the origin has the form where a and dare
.
d. A mapping is one-to-one if each vector in Rn maps onto a unique vector in Rm.
e. If A is a 3 x 2 matrix, then the transformation cannot map R2 onto R3.
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