| Recent Answers from David Moran |
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2008-01-14 Amplitude frequency response: Hi Sergey, I am a mathematician, however, I am not a professor. I wanted to make this correction first. As far as the question at hand, I am not aware of any methods to find the amplitude frequency response...
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2007-12-04 IVP: I don't have time to do a complete solution, but first get the characteristic solutions. This is found by finding the characteristic equation, which is r^2-3r+2=0 in this case. Solve for r. r^2-3r+2=0...
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2006-10-03 Close form Solution of differential equation: I'm not sure that this will work, but let's try it. Let d2y/dx2=dp/dx So... dp/dx+1/(x+c1)=0 dp/dx=-1/(x+c1) dp=-dx/(x+c1) Now integrate both sides p=-ln|x+c1| Since d2y/dx2=dp/dx, dy/dx=p...
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2006-09-13 Initial value problems: I'll work this out entirely as an example. The characteristic equation is r^2+1=0 and the solution to that equation is r=i,-i so the solution will take the form y=c1cos x + c2sin x. Taking the derivative...
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