Question: o a computer, a digital grayscale photo is a rectangular array of numbers indicating the brightness of the individual pixels. In this context, multiplying by

o a computer, a digital grayscale photo is a rectangular array of numbers indicating the
brightness of the individual pixels. In this context, multiplying by a scalar adjusts the brightness
of the entire photo. For instance, scalar multiplication by 2 doubles the brightness of each pixel.
Let A and B be the matrices representing two grayscale pictures of width n and height m

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