Final answer:
The solution to the equation ax=0 in parametric vector form is a set of vectors where each component of the vector is equal to 0.
Step-by-step explanation:
To describe all solutions of ax=0 in parametric vector form, we need to consider that a is a row equivalent vector. In this case, the null vector, denoted by 0, has no length and no direction. So, the solution to the equation ax=0 in parametric vector form is a set of vectors where each component of the vector is equal to 0.