Question

How do I know if a linear equation is linear?

Answer 1

A linear equation will always form a straight line

Answer 2

How do I know if a linear differential equation is linear?

Answer 3

I wouldn't be the best person to give you advice on that, and I don't want to give you the wrong answer. Good luck finding help though.

Also, what I forgot to write in my first response:

Must have two or less variables and none of the variables can be raised to a power.


Good luck!

Answer 4

Thank you

Answer 5

A differential equation is linear if, for any two solutions u1 and u2, c1 u1 + c2 u2 is also a solution.

Answer 6

is u1 p(x) and u2 q(x) in y'+P(x)y = Q(x)?