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If $\mathrm{A}$ and $\mathrm{B}$ are diagonal, show that $\mathrm{A}$ and $\mathrm{B}$ commute....

Question

If $\mathrm{A}$ and $\mathrm{B}$ are diagonal, show that $\mathrm{A}$ and $\mathrm{B}$ commute.

If $\mathrm{A}$ and $\mathrm{B}$ are diagonal, show that $\mathrm{A}$ and $\mathrm{B}$ commute.



Answers

Find two matrices $A$ and $B$ such that $AB=BA$.


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