Discrete Math Question

1. (4 points) Find a closed-form representation of the following recurrence relations: (a) (4 points) an = 60-1-90-2 for n 2 2 with initial conditions ag = 4 and a1 = 6. (b) (4 points) an = 40-1+50,-2 for n 2 2 with initial conditions ag = 2 and a1 = 8. (c) (4 points) an = -90n-2 for n 2 2 with initial conditions on = 0 and 01 = 2