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qtwerp · 06-14-2007

-1^3/2 is -i and not i. Euler's identity: e^(i*pi) = -1. Should be using that instead since there's a wave function in there.

I think the second doesn't work because of a domain issue, but I'm not sure any more. I'd have to go through a formal proof to conclusively find what the fault is.

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A bit more difficult one this time:

x²y'' + 3xy' + y = 0

06-14-2007	#10 (permalink)
qtwerp Retired User Join Date: May 2007 Posts: 372	Re: Math Problem Game -1^3/2 is -i and not i. Euler's identity: e^(ipi) = -1. Should be using that instead since there's a wave function in there. I think the second doesn't work because of a domain issue, but I'm not sure any more. I'd have to go through a formal proof to conclusively find what the fault is. ------------------- A bit more difficult one this time: x²y'' + 3xy' + y = 0 Last edited by qtwerp : 06-14-2007 at 05:16 PM. Reason: Above poster solved previous question while writing out answer, so answered above poster's problem*
qtwerp Retired User Join Date: May 2007 Posts: 372