Solved: Use Exercise 33 to prove Theorem 4. [Hint: Count
Chapter 5, Problem 5.4.35(choose chapter or problem)
Use Exercise 33 to prove Theorem 4. [Hint: Count the number of paths with n steps of the type described in Ex- 5-36 ercise 33. Every such path must end at one of the points (n - k, k) for k = 0, 1 , 2, . . . , n.]
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