d \( \frac{x!}{(x-2)!}= \) e) \( \frac{6!}{5!-2!}= \) f) \( \frac{8!}{4!\cdot 6!} \)
Upstudy AI Solution
Answer
Solution
Answered by UpStudy AI and reviewed by a Professional Tutor


The Deep Dive
Let’s have some fun breaking this down! To simplify \( \frac{x!}{(x-2)!} \), we notice that \( x! = x \cdot (x-1) \cdot (x-2)! \). So, when we divide \( x! \) by \( (x-2)! \), all the \( (x-2)! \) in the numerator and denominator cancels out, leaving us with \( x(x-1) \). Now, for \( \frac{6!}{5!-2!} \), we first know that \( 5! = 120 \) and \( 2! = 2 \). Thus, \( 5! - 2! = 120 - 2 = 118 \). When we calculate \( \frac{720}{118} \) (since \( 6! = 720 \)), we find approximately \( 6.10 \). Lastly, \( \frac{8!}{4! \cdot 6!} \) is a combination formula in disguise! The value of \( 8! = 40320 \) while \( 4! = 24 \) and \( 6! = 720 \). Putting these together gives us \( \frac{40320}{24 \cdot 720} \), which simplifies to \( \frac{40320}{17280} = 2.333 \) or \( \frac{7}{3} \) in fractional form!