Concept explainers
A vending machine dispensing books of stamps accepts only one-dollar coins, $1 bills, and $5 bills.
a) Find a recurrence relation for the number of ways to deposit n dollars in the vending machine, where the order in which the coins and bills are deposited matters.
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b) What are the initial conditions?
c) How many ways are there to deposit $10 for a book of stamps?
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Discrete Mathematics and Its Applications ( 8th International Edition ) ISBN:9781260091991
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