Answer: 2.
- A 2
- B 1
- C 3
- D 0
Correct answer: A. 2
Explanation: Order is the highest derivative present, here d²y/dx², so the order is 2.
The general solution y=Ax² represents an entire FAMILY of curves, one for each value of the arbitrary constant A; a particular solution (fixed by an initial condition) selects exactly one curve from this family.
Concept context
Equations involving derivatives and their solutions