Recent content by Marco Lugo

Sorry I'm not seeing the difference. I could see how it would be wrong if it were, there exists a x in R such that for all y in R, y>x. But the statements above seem the same.

The class is called Math for EE and CE. The professor teaches from his own notes and doesn't give many examples. Any help checking my work would be appreciated and/or if you could point me in the direction of more examples like these. I've looked trough Set Theory and discrete math books but...

It worked! I had to use the exp(t) notation; which is weird because the software usually isn't picky and it would say if it wanted something expressed in a certain way. Anyway thanks Mark44 and Ray Vickson for all you're help :D

I checked the initial condition but you're right I should have substituted my solution into the problem. my solution, y(t) = 7tet + 8e8t - 6et check: dy/dt= 64e8t + 7tet + et substituting both into the initial probelm, dy/dt - y = 56e8t + 7et 64e8t + 7tet + et - 7tet - 8e8t + 6et I get...

Homework Statement https://webwork.utpa.edu/webwork2_files/tmp/equations/2d/02a7e6a06f5b2424758fa01cc965f71.png with https://webwork.utpa.edu/webwork2_files/tmp/equations/80/81c176aa8964438a63eb096513245f1.png Homework Equations [/B] Standard form: y' + p(x)y = f(x)...

Wow thanks! I'll definitely keep this in mind when working on similar problems. No worries, good luck on your midterms! How did you get to that solution?

Ah yes I see. Alright thanks for your help!

Thanks I see that now haha Thanks for your help; it makes sense now that I see it. Would there be away to find r directly or would I just have to try them all?

Homework Statement Let xy''-y'=0. Try a solution of the form y=xr. Is this a solution for some r? If so, find all such r. Homework Equations xy''-y'=0 y=xr The Attempt at a Solution The answer I came up with was: r*x-r*x=0, for all r. But in the solutions it says, "y = xr is a solution for...