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OpenStudy (anonymous):
Which product is undefined?
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OpenStudy (anonymous):
OpenStudy (anonymous):
AB BA CD DB
OpenStudy (saifoo.khan):
When you multiply something like this, it is undefined. http://www.mai.liu.se/~hanlu09/matrix/undefined.png
OpenStudy (saifoo.khan):
The rows and columns won't match.
OpenStudy (anonymous):
So, do they have to match completely?
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OpenStudy (saifoo.khan):
No. The ROW of the first matrix has to be of the same size as the COLUMN of the second.
OpenStudy (anonymous):
oh okay
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