Question 43317
This isn't as hard as you think...from
a_(n+2)= a_(n+1) - 4a_n
you merely plug in a_1 = -4 and a_2 = -4 to find a_3...
a_3 = -4 - 4(-4) = 12 now continue
a_4 = 12 - 4(-4) = 28
a_5 = 28 - 4(12) = -20
Choice C.