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Nov
1
comment Matrix addition, multiplication and inversion problem
@Martin Sleziak, I get (I - A) if I multiply matrices (I - A)(I - A) and the identity matrix if I multiply (I - A)(I + A + A^2) but I'm not sure how to evaluate (I - A)^-1.
Nov
1
asked Which one of the following is true for all vectors $u$, $v$ and $w$ where $u\cdot v = 0$ and $u\cdot w = 0$?
Nov
1
comment Matrix addition, multiplication and inversion problem
Hi, I edited the question and it now reads correctly, my apologies for the mistake
Nov
1
awarded  Editor
Nov
1
revised Matrix addition, multiplication and inversion problem
edited body
Nov
1
asked Matrix addition, multiplication and inversion problem
Nov
1
asked Which one of the following vectors in R^3 is a unit vector that is parallel to the plane with general equation 2x+2y+z=1?
Nov
1
awarded  Student
Nov
1
asked Describing the intersection of two planes