Q. No. 5. Let a =1 for all n 2 0. Then the ogf sequence ( a ) equals 1+m+m'+...=(1-m)"=f(x) . So, for n 2 0, the ogf for (a) a,, = n for all n 21? (b) a =n' for all (n 21)? (c) Using the above two examples, the ogf of the sequences a =3n + 5n for all (n 21)