What is $\dbinom{n}{n-1}$ for any positive integer $n$?  (Answer in terms of $n$.)
Question:
What is $\dbinom{n}{n-1}$ for any positive integer $n$?  (Answer in terms of $n$.)
Answer:
Let's think step by step.

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What is $\dbinom{n}{n-1}$ for any positive integer $n$?  (Answer in terms of $n$.)
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