Recent questions without answers

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3241
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3243
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3244
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3245
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3247
How many ways are there to pay a bill of $17$ pesos using the currency described in question $4,$ where the order in which coins and bills are paid matters?
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3250
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3251
Use mathematical induction to verify the formula derived in Example $2$ for the number of moves required to complete the Tower of Hanoi puzzle.
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3254
Show that the correspondence described in the preamble is a bijection between the set of permutations of $\{1, 2, 3,\dots,n\}$ and the nonnegative integers less than $n!....
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3256
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3260
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3262
Prove the Multinomial Theorem: If $n$ is a positive integer, then $\displaystyle{}(x_{1} + x_{2} + \dots + x_{m})^{n} = \sum_{n_{1} + n_{2} + \dots + n_{m} = n}\:\: C(n:n...
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3263
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3264
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3265
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3266
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3268
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3269