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2. ) Given the sequence 9, 3, 1,… , find ∞​


Sagot :

Answer:

13.5

Step-by-step explanation:

Sum of infinite geometric sequence

S= A1/1-r

A1=9 (first term)

R= 1/3 (common ratio)

S= 9/(1-(1/3))

S= 13.5

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