Recent content by S.Amstein

Pick Best Calculator for Engineers. Of course this Calculator needs to graph. Buts also needs room for notes , and be able to scroll through old calculation. Suggestions?

Ahh, there it is. Thank You ! I still don't have a 100% handle on why the removal of logarithms creates a multiplication of the inside terms . is there a theorem or rule for this process?

Y' = (x^2+2y^2)/xy make y =xv , y'=v + xv' simplify to xv'= (1+v^2)/v rearrange to 1/x dx = (v/(1+v^2))dv Integrate ---> ln ( 1+v^2) ^ (1/2) = ln (x) + C simplify ----> v = ( x^2 + C) ^ (1/2) Y = x*( x^2 + C) ^ (1/2) Y^2= x^4 + (x^2*C) But the solution in the back is y^2 = kx^4 -x^2...

Homework Statement determine whether the given differential equations are homogenous and, if so, solve them. Homework Equations dy/dx = (( x^2 -2y^2)/xy ) The Attempt at a Solution i assumed it was homoG. Then i replaced ( x*v) for each Y and made dy/dx --> v+x*(dv/dx)...