Question

how to find an order of differential equation?

Answer 1

Check the highest order of the derivative in any given equation.
For example, the degree of
\[y^{(4)}-3xy''+y^2=\sin x\]
is 4, as that is the highest order derivative present in the equation.

Answer 2

how to find degree?

Answer 3

Degree is the same as order in this context.

Answer 4

u mean that degree nd order are same in DE?

Answer 5

order is the highest derivative ...

degree is the power of the order.

\[\frac {d^4y}{dx^4}\text{ is a degree 1, order 4}\]
\[\left(\frac {d^3y}{dx^3}\right)^5\text{ is a degree 5, order 3}\]

Answer 6

http://www.efunda.com/math/ode/generalterms.cfm

Answer 7

Much better way of phrasing. Thanks @amistre64.