Vinicius L. Beserra
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 Curious
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  • 106 votes cast
Jun
29
comment 3rd Euler Equation How to solve
And What about the particular solution?
Jun
29
revised 3rd Euler Equation How to solve
added 186 characters in body
Jun
29
comment 3rd Euler Equation How to solve
I have found for this case 3 roots, one real and two complex.
Jun
27
comment 3rd Euler Equation How to solve
And if I try to use change of variables?
Jun
22
asked 3rd Euler Equation How to solve
Apr
23
awarded  Curious
Apr
22
asked Linear differential equation
Apr
21
comment What is the tip for this exact differential equation?
Sorry. I know that u have made use of change of variable. I understood partially the solution but. For this reason I asked u if some steps where hidden. I can see that u derivate in second line d(y/x). What does LHS and RHS mean?Where´s the original expression? How did u get the 4th line?
Apr
21
comment What is the tip for this exact differential equation?
Sorry. I know that u have made use of change of variable. I understood partially the solution but. For this reason I asked u if some steps where hidden. Thanks
Apr
20
comment What is the tip for this exact differential equation?
Did your hide some steps?
Apr
20
comment What is the tip for this exact differential equation?
Thanks for the helpe, but I need detailed explanation.
Apr
20
awarded  Custodian
Apr
20
comment What is the tip for this exact differential equation?
(x^3+xy^2+y)dx= M and N= (x^2y+y^3−x)dy
Apr
20
reviewed Approve What is the tip for this exact differential equation?
Apr
20
asked What is the tip for this exact differential equation?
Apr
6
comment How do I find a formulae for $S_n$ for the sequence 3/16, 3/64,3/256, 3/1024?
The answer is 4^(n)-1/4^(n+1)
Apr
5
asked How do I find a formulae for $S_n$ for the sequence 3/16, 3/64,3/256, 3/1024?
Mar
20
comment Help with this differential equation
Thanks Frieder.
Mar
17
comment Help with this differential equation
Thanks Frieder. Have you got the book or any site where I can see the solution step by step. It´s because we learn here in other way. In fact your answer is right, but I don´t understand how do you eliminate the natural log in both sides of the equation and how do you find the last line of this expression. \begin{array}{l} (x - 2y + 5){\rm{dx}} = u(1 - 2){\mathop{\rm du}\nolimits} \\ (2x - y + 4){\rm{dy}} = ut(2 - t)du + (2 - t){u^2}dt\\ (1 - {t^2}){\mathop{\rm du}\nolimits} + (2 - t)u{\mathop{\rm dt}\nolimits} = 0 \end{array}
Mar
16
accepted Help with this differential equation