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01-02-2019
Mathematics

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Consider the sequence below.

3 , 1 , 1/3 , 1/9 , ...

Select the explicit function which defines the sequence.

Consider the sequence below 3 1 13 19 Select the explicit function which defines the sequence class=

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a5904640 a5904640

01-02-2019

As we can see it's a geometric progression.

q = a2/a1

q = 1/3

so,

an = a1 . q^(n - 1)

an = 3 . (1/3)^(n - 1)

The one which matches is f(n) = 3 . (1/3)^(n - 1)

Alt C.

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