itsmee12333
itsmee12333
04-07-2018
Mathematics
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jimthompson5910
jimthompson5910
04-07-2018
Choice D is the answer
because it is the only answer choice that has
a_1 = 5
as the proper first term.
The original equation a_n = 5*(-1/8)^(n-1) is in the form a_n = a_1*(r)^(n-1). Match up terms to find that a_1 = 5 and r = -1/8.
Note: the recursive step shown in choice D basically says "to get the nth term, multiply the previous (n-1)st term by (-1/8)"
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