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# If you multiply two matrices that are not the same dimensions what happens

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For example if you are multiplying a 2x4 matrix by a 3x9 is it considered as undefined?

Sep 1, 2019

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$$\text{An m\times k matrix may multiply a k \times n matrix to produce a m \times n matrix}$$

The example you gave is undefined.

Sep 1, 2019
edited by Rom  Sep 2, 2019
edited by Rom  Sep 2, 2019
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thank you so much!!

Nirvana  Sep 1, 2019