I have trouble with this question
Any help is appreciated, thanks!
Any help is appreciated, thanks!
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Differentiation Help! (2 Viewers)
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Bored_of_HSC
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Plug in y, dy/dx and d2y/dx2 and equate coefficients. You can solve from there easilyI have trouble with this question, and have no idea where to start...
Any help is appreciated, thanks!
(or it may be messy)
oh oops I totally forgot about that lol, thanks
is there a faster way though? I've done a similar question to this before and I didn't have to sub in anything
EDIT: just subbed everything in but I still don't get how you can find a, b and c :S
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nightweaver066
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Find dy/dx and d^2y/dx^2oh oops I totally forgot about that lol, thanks
is there a faster way though? I've done a similar question to this before and I didn't have to sub in anything
EDIT: just subbed everything in but I still don't get how you can find a, b and c :S
Sub in y and dy/dx in to the differential equation.
Rearrange such that d^2y/dx^2 is on one side and everything else is on the other.
Equate coefficients with d^2y/dx^2 equation.
I haven't tried this yet but it may work.
You could mix things around like subbing in y and d^2y/dx^2, or dy/dx and d^2y/dx^2 to try it out.
Bored_of_HSC
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Not sure if there's a faster way :/ (can't see one, but someone else might have oen)oh oops I totally forgot about that lol, thanks
is there a faster way though? I've done a similar question to this before and I didn't have to sub in anything
EDIT: just subbed everything in but I still don't get how you can find a, b and c :S
And i'm not sure why it isn't working. Take a pic of your working and post it up?
Oh... I think I got it with nightweaver's method, and basically equated the coefficients of x, lnx and the constants, ending up with 3 simultaneous equations.
Bored_of_HSC
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Nightweavers way was my way lol.
nightweaver066
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LOL i was thinking if they were the same but i couldn't really understand it the way you expressed it.Nightweavers way was my way lol.
Work on your english m8
ah sorry!Nightweavers way was my way lol.
nightweaver's post was clearer I guess lol
Bored_of_HSC
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Yeah screw you too lol
But it's more of me being lazy and not wishing to type anything in (i'll be hopeless with latex lol)
ok so far I got
hopefully I didn't screw it up...
hopefully I didn't screw it up...
Bored_of_HSC
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Can't argue there haha.
nightweaver066
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Same equations i got.ok so far I got
hopefully I didn't screw it up...
RealiseNothing
what is that?It is Cowpea
That's right.ok so far I got
hopefully I didn't screw it up...
Would rep everyone but... yeah
iBibah
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Yep I got same.ok so far I got
hopefully I didn't screw it up...
EDIT: lol a bit late again. should have read on to see I had been beaten twice :|
ah that's ok! Appreciated your time and effort anyway
RealiseNothing
what is that?It is Cowpea
I'm sure there is an easier way to do this question though.
That's what I've been thinking, but I guess a long method is better than no method at all