Answer
True.
Work Step by Step
From earlier in the chapter, this is the definition of n factorial (multiplying all the positive integers once that are not larger than $n$), thus the statement is true.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.