Question 43317: I just don't even know what to say..................help!!!!!!!!!!!!!!!!!
Given the following recursively defined sequence, find the fifth term.
a_1 = -4
a_2 = -4
a(_n+2)= a(_n+1)-4a_n
a. 28
b. 764
c. -20
d. -308
e. None of the others
Found 2 solutions by fractalier, psbhowmick:
Answer by fractalier(2101)   (Show Source):
You can put this solution on YOUR website!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.
Answer by psbhowmick(489)  (Show Source):
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