Question

find the sum of infinity of 9+3+1​

Answer 1

Answer:

This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by 13 gives the next term. In other words, an=a1⋅rn−1 a n = a 1 ⋅ r n - 1 . The sum of a series Sn is calculated using the formula Sn=a(1−rn)1−r S n = a ( 1 - r n ) 1 - r .

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Answer 2

Answer:

ANSWER IS

9+3+1=13

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