A few days ago
!!!!!!!!!!!!Algebra question plz help!!!!!!!!!?
suppose A and B are invertivle matrices.Either show for all such A and B that A + B is invertible ,or produce a counter example!!!!
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A few days ago
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You’ve typed in your homework problem; where are you stuck?
What I observe here is that the problem is to determine whether a multiplicative property is closed over addition. The two classes generally don’t intermix. For instance, if we back off to real numbers, -2 and 2 are both invertible under multiplication, yielding -.5 and +.5. Their sum is 0, which does not invert.
Does this give you a gut feeling you can use? If not, show us how far you got, and we’ll give you an assist over the hard point.
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