Solve the series: \(\displaystyle\lim_{{{n}\to\infty}}{\frac{{{k}+{1}}}{{{3}^{{k}}}}}\)

juctommaccedo662f

juctommaccedo662f

Answered question

2022-03-22

Solve the series:
limnk+13k

Answer & Explanation

Jayda Burch

Jayda Burch

Beginner2022-03-23Added 10 answers

Let X be a geometric random variable with probability of success p=23, so that
P(X=k)=(1p)k1p=23k, k=1,2,3,
From the easy-to-remember fact that E(x)=1p, it follows that
32+1=E(X)+1=E(X+1)=k=1(k+1)P(X=k)=2k=1k+13k
Hence
k=1k+13k=54

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