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2 answers:
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Answer:
<h3>The answer is option D</h3>Step-by-step explanation:
Since the sequence is a geometric sequence
For an nth term in a geometric sequence
where
n is the number of terms
a is the first term
r is the common ratio
To find n we must first find the common ratio
To find the common ratio divide the previous term by the next term
That's
r = 3/1 = 3 or r = 9/3 = 3
a = 1
Substitute the values into the above formula
That's
If n is an integer then
where n is greater than or equal to 2
Hope this helps you