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LuckyWell [14K]
3 years ago
8

Find an equation for the nth term of the sequence. -4, -16, -64, -256, ...

Mathematics
2 answers:
dusya [7]3 years ago
5 0
It would be

an = 4×4n + 1
trasher [3.6K]3 years ago
3 0
Ok, so seems to be geometric
an=a1(r)^(n-1)

a1=first term
r=commonr atio
n=number of term
first term is -4
common ratio is -16/-4=4

so
a1=-4
r=4

a_n=-4(4)^{n-1}

D is the answer
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