Brian_D's latest activity
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Brian_D replied to the thread Finding the nth roots of a complex number.Fabulous, thank you for clearing this up, FactChecker. But in this case, there IS a real root and, at least the way I am using the...
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Brian_D replied to the thread Finding the nth roots of a complex number.And the homework statement is: Solve ##\left(-2+2 \,\mathrm{I}\right)^{\frac{1}{3}}## Sorry for the mess.
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Brian_D replied to the thread Finding the nth roots of a complex number.Here is my LaTeX code again $$a+\mathit{bi}=r\! \left(\cos\! \left(\theta \right)+\mathrm{I} \sin\! \left(\theta \right)\right)$$...
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Brian_D replied to the thread Finding the nth roots of a complex number.I don't know why my LaTeX code is not displaying, so I'll try posting it here: $$a+\mathit{bi}=r\! \left(\cos\! \left(\theta...
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Brian_D posted the thread Finding the nth roots of a complex number in Calculus and Beyond Homework Help.There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n...
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Brian_D replied to the thread Unable to display LaTeX.Thank you.
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Brian_D replied to the thread Unable to display LaTeX.Yes! I was missing the double $ delimiters. Thank you, berkeman. :-)
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Homework Statement: Not applicable. I'm asking about a technical problem with the PhysicsForums software Relevant Equations...
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you. To avoid confusion, I should have posted the matrix I was using, but for some reason when I post LaTeX code with my computer...
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you, nuuskur. My "textbook" is a McGraw Hill "Practice Makes Perfect" study guide, _Linear Algebra_, p. 81, problem c. I don't...
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you, Mark44, this is also very helpful. Your explanations and those of PeroK and others in this forum have given me as good an...
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you, this gives me a better understanding of it.
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you, Mark44, this is very helpful. But I'm still trying to understand why it doesn't matter that the vectors are in R4.
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Brian_D replied to the thread Conflicting definitions of linear independence.Thank you, PeroK, this helps a lot. Without a fourth row vector, there cannot be a fourth coefficient. But when you say "And that...
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Brian_D replied to the thread Conflicting definitions of linear independence.Doesn't the fourth element of each vector represent a coefficient, namely zero?
