stem-plot difference of equations

Here is the question

Find numerically and stem-plot the solutions of the difference equations [1<=k<=10]

a. y(k+1) - 3*k*y(k) = 0

b. y(y+1) - k*y(k) = 1

assume that y(1)=1

not sure if i am looking at this properly but here is what i was thinking. a and b do not have the same y values after 1 since in order to get 0 for the first one y(2) needs to be 3 while for equation b y(2) needs to be 2. So solve them differently and then plot? i am not sure which would be my x and y for stem plot as well. This looks simple but its confusing me not sure if am over thinking. I am not sure if its suppose to be answered separate or together

Thank you for your time

[Walter Roberson]

duplicates http://www.mathworks.co.uk/matlabcentral/answers/109834-stem-plot-difference-of-equations