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Question: equality between two finite sums

Question:equality between two finite sums

Chaggara 60 Maple
simplification summation pochhammer
March 11 2021
2

Let d and i two integers 

Put 

A := -(sum((-1)^k*binomial(i, k)*pochhammer(d*k+1, i), k = 0 .. i))/factorial(i)

and 

B := (sum((-1)^k*binomial(i+1, k)*pochhammer(d*k+1, i+1), k = 0 .. i+1))/(d*factorial(i+1))

Question: Show that A=B

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