Hi, I'm in a hurry,
how to find order of an recurrence relation
for example :
an= an-1 + an^2-2
there order of this function is "2"
how is that be?
and what is the meaning of order
please help me,

In the middle of a test?

What did your textbook say about determining this? How would you go about it? It is important to know as this years courses are the foundation for next years... if you don't understand this years work, how will you understand next years?