Which formula can be used to describe the sequence below?
27,9,3,1,1/3
2 answers:
Answer:
D. an=3an-1-1/3;a1=27
Step-by-step explanation:
This is a geometric sequence with an initial term of 27 and a common ratio of 1/3
This just means that each term is 1/3 the term preceding it.
Any geometric sequence can be expressed as:
a(n)=ar^(n-1), a=initial term, r=common ratio, n=term number in this case:
a(n)=27(1/3)^(n-1)
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Step-by-step explanation:
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