Which differential equations are Linear and find their Proper Linear Form

Northbysouth
Messages
241
Reaction score
2

Homework Statement


Which of the following differential equations are linear? Put the linear differential equations in proper linear form

a) t2dy/dt -et = ty

b) dy/dt + ytan(t) -ety(2)=0

Essentially, I'm struggling with basic algebra. I've had no luck moving the dependent variable, y, to one side and the independent variable,t, to the other. Any suggestions would be appreciated.


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
Northbysouth said:

Homework Statement


Which of the following differential equations are linear? Put the linear differential equations in proper linear form

a) t2dy/dt -et = ty

b) dy/dt + ytan(t) -ety(2)=0

Essentially, I'm struggling with basic algebra. I've had no luck moving the dependent variable, y, to one side and the independent variable,t, to the other. Any suggestions would be appreciated.
How does your book define the term, linear differential equation? To get to that form, you don't want to solve for y - you want to put all the terms involving y and y' on one side, and everything else on the other. For a), you would want the left side of the equation to start with dy/dt. What can you do to get dy/dt by itself?
Northbysouth said:

Homework Equations





The Attempt at a Solution

 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
Back
Top