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TURBONTRO6830
06.05.2020 •
Mathematics
4.Is it sometimes, always, or never true that, if A and B both have dimensions n x n , AB=BA ? Explain.
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Ответ:
Is true sometimes.
Step-by-step explanation:
I guess that here we have two matrices, A and B, that are nxn.
We can see that if those matrices can conmutate, then we can try it with some simple matrices.
Here, we would have that:
You can see that AB and BA are different, then the statement is not always true.
But it is true sometimes, if A or B are the identiti, then I*A = A*I, in this case would be true.
It is also true if A and B are diagonal matrices, let's prove it:
Ответ:
y=2x+3
Step-by-step explanation:
m=2
y int.=3