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## Homework Statement

I want to find the limit of ƩK(n+m,n)z

^{n}

K(a,b) being the binomial coefficient.

## Homework Equations

Cauchy root test?

## The Attempt at a Solution

Trying the cauchy root test I get:

1/R = lim

_{n->∞}[(K(n+m,n))

^{½}]

But what do I do from here?