Finding a Solution to a Complex Homework Problem

In summary: Sorry, I'm not sure what to do. Is there any way you could just tell me the answer?In summary, the conversation discusses how to prove that for a matrix A that is m x n and a span of X1, X2, ..., Xq, if A is a zero matrix, then it is impossible for AXp to be zero for any p. The conversation goes on to discuss that this is true because if A is nonzero, there must be a nonzero entry in one of its columns and a vector in R^n can be chosen such that Ax is nonzero. Lastly, the conversation addresses the concept of span and how x is a single vector in R^n and not equal to the span of X1,
  • #36
I think you've picked up some good points here and I think you'll get better. Thinking 'some i' is the same as 'all i' is pretty typical of the problems you are having. These words aren't interchangable. If you do choose to get a tutor, ask for help on basic logic in proofs, ok? The language isn't as vague as you are treating it.
 
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  • #37
I really hope this is one of those things that gets easier as you do more problems. I will definitely mention basic logic to my tutor if I get one. I tried searching it on the internet but didn't find much. Thanks again for the help and advice!
 
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