1 . y=1x

• A. $\frac{n!}{x^{n+1}}$
• B. $\frac{{\left(-1\right)}^{n}n!}{x^{n+1}}$
• C. $\frac{{\left(-1\right)}^{n+1}n!}{\left(n+1\right)!}$
• D. $\frac{{\left(-1\right)}^{n+1}n!}{\left(n-1\right)!}$

Answer: Option B

Explanation:

2 . y=1x

• A. $\frac{n!}{x^n}$
• B. $\frac{\left(n-1!\right)}{x^{\left(n-1\right)}}$
• C. $\frac{1}{x^n}$
• D. $\frac{{\left(1!\right)}^n\left(n!\right)}{x^{\left(n-1\right)}}$

Answer: Option D

Explanation: