Question

differentiate first order second order and zero order

Answer 1

0 order f(x) = a
1st order f(x) = a x
2nd order f(x) = a x^2
Example of 2nd order equation
f(x) = a x^2 + b x + c
notice that the order decreases in order in equation
These algebraic in use same principle with differential equation
2nd order
y'' + a y' + b y = f(x)