| In case anyone ask for this.... Be warned, I am still taking this course!! |
sifmaAug 2, 2008 2:20 PM
bla bla bla The endless debate between fans and haters. At one point, after spending a lot of time on MAL, you just realize it's totally pointless.Niko-kun said: On MAL, everyone who has used the lame rating system becomes a critic and an intellectual by default, haven't you heard? |
| Okay, I'm really confused but how do I take the derivative of f(x) = x ln (arctanx)? |
"Someone once told me that, 'Friendships come with meetings, partings and reunions.' But how could you truly part with someone if they're always there...in your heart?" |
| that question is part of calculus, not differential equations! Product rule between x and ln(arctan x) then chain rule on ln(arctan x) df/dx = x * d(ln(arctan x))/dx + d(x)/dx * ln(arctan x) Then d(ln(arctan x))/dx (by chain rule) is (1/(arctan x))*(1/(1+x^2)) so df/dx = x/((1+x^2)(arctan x)) + ln(arctan x) That's it, can't simplify anymore, unless you want to do a power series decomposition? BTW, differential equations look like something like y'' - 5y' + 6y = 2 (a second order linear ordinary differential equation ---> very easy!!) |
bla bla bla The endless debate between fans and haters. At one point, after spending a lot of time on MAL, you just realize it's totally pointless.Niko-kun said: On MAL, everyone who has used the lame rating system becomes a critic and an intellectual by default, haven't you heard? |
| Ahh gomen gomen! But thanks for answering anyway. I really appreciate it ^^ |
| "Someone once told me that, 'Friendships come with meetings, partings and reunions.' But how could you truly part with someone if they're always there...in your heart?" |
| when you say differential equations, is this only ordinary differential equations, or do we have people here who know how to do partial differential equations? |
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| I'm taking PDEs next semester.... sorry can't help you right now.... We need to get more university students in this club... |
bla bla bla The endless debate between fans and haters. At one point, after spending a lot of time on MAL, you just realize it's totally pointless.Niko-kun said: On MAL, everyone who has used the lame rating system becomes a critic and an intellectual by default, haven't you heard? |
| well, i've already done ODEs, but I'm going to be taking PDEs in the spring, so i won't need help... yet... |
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