# math problem

hey all,
i got this problem in my midterm today and i’m eager to find out if i did it right… any math geeks around?

yakes, oh the horror multivarible calculus! breaks out into cold sweats as memorys of second year engineering comes flooding back.

I would help but that would be like doing your homework for you plus i haven’t touched a calculus book in years so I would be the wrong person for this.

i don’t see the “doing your homework” part… this is not homework…
thanks anyway.

i used to hate calculus myself, but the instructors here made me like it…

well I could be wrong but last time I did differiential equations which is what I assume you original equation is checking if a solution was right was trivial finding it not so. plonk you solution back into the orignal equation and see if it holds.

wow, that equation looks fun

Yeah, looks good. The way you did it is correct and the actual calculations seem to be fine, although I didn’t really look through them very thoroughly. Typical example for exact ODEs, all around the world (had to do very similar stuff when I took a lecture on ODEs).

Yep, that looks okay. The only “error” was in your description when solving for a and b. You said it’s “either or,” but it should be “both,” which is what you solve for, anyway, so its all good. :yes:

-Laurifer

Could someone please point out how that applies in the real world.

I never did any calculus or algebra at school and here I sit.

The point I make is that the education system appears to fill your mind with a lot of meaningless stuff, yet appears to overlook the fact that the primary producer is the one that appears to do 98% of the work.

Still, I can appreciate the work you would need to do to learn all that stuff.

thanks Laurifer for pointing that out… what i love about this math instructor is he does everything logically and using English and he wants us to do the same. he made me believe math shouldn’t be like ancient scriptures that you had to struggle to understand.

azecraze… this particular topic is important because we used to learn math as if everything in life was deterministic and linear. in the real world, most things change in a non-uniform way so you need differential equations to express those…