Am I close with this or way off?
First I have to decide if this is a linear constant coefficient recurrence relation
I think a. The equation is not linear because the base this is squared.
b. The equation is not constant coefficient recurrence relation because one of the coefficients is not constant.
but, I also feel the equation could be linear because (excuse my simplicity, but I'm a beginner here), because the equation moves down in steps a_(k+1) --> a_(k)
may I ask you advice please?