A sum involving binomial coefficient

In summary, a binomial coefficient is a mathematical term used to represent the number of ways to choose a subset of items from a larger set. Sums involving binomial coefficients are significant in mathematics as they can be used to calculate probabilities and represent arrangements and choices. The binomial theorem is an example of a sum involving binomial coefficients, and it is also related to Pascal's triangle. These sums have various real-world applications, including in probability, genetics, and economics.
  • #1
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[tex]sum_{i=k}^{n} {i \choose k}i^{-t}[/tex]

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where t is a constant.

Does it have a closed form?
 
Last edited:
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  • #2
A closed form is possible only for integral values of t (that too, if you can solve the differential equation involving the generating function).
 

Related to A sum involving binomial coefficient

1. What is a binomial coefficient?

A binomial coefficient is a mathematical term that represents the number of ways to choose a subset of items from a larger set. It is denoted by the symbol "n choose k" and can be calculated using the formula n! / (k! * (n-k)!), where n and k are positive integers.

2. What is the significance of a sum involving binomial coefficients?

Sums involving binomial coefficients are commonly used in mathematics to represent the number of ways to arrange or choose objects from a larger set. They can also be used to calculate probabilities in various scenarios, such as in coin tosses or card games.

3. Can you provide an example of a sum involving binomial coefficients?

One example of a sum involving binomial coefficients is the binomial theorem, which states that (a+b)^n = sum from k=0 to n of (n choose k) * a^(n-k) * b^k. This formula is used in algebra to expand binomial expressions.

4. How is a sum involving binomial coefficients related to Pascal's triangle?

Pascal's triangle is a triangular array of numbers where each number is the sum of the two numbers directly above it. The coefficients in a sum involving binomial coefficients can be found in each row of Pascal's triangle, and the sum itself can be calculated by adding the numbers in the row.

5. Are there any real-world applications of a sum involving binomial coefficients?

Yes, sums involving binomial coefficients have many real-world applications. They are commonly used in probability and statistics to calculate the likelihood of certain events occurring. They can also be used in fields such as genetics and economics to model and analyze different scenarios.

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