Project ID:
7100000015
Accepted:
Type:
Layout:
Question:
Pair expressions with their simplified forms.
Question 1:
$$\frac{(n-1)!}{(n+1)!}$$
Answer 1:
$$\frac{1}{(n+1)\cdot n}$$
Question 2:
$$\frac{(n+2)(n+1)!}{n!}$$
Answer 2:
$$(n+2)(n+1)$$
Question 3:
$$\frac{(n+2)!}{(n+2)(n+1)}$$
Answer 3:
$$n!$$
Question 4:
$$\frac{1}{n!}+\frac{1}{(n+1)!}$$
Answer 4:
$$\frac{n+2}{(n+1)\cdot n!}$$
Question 5:
$$\frac{(n+2)!}{(n+1)!}$$
Answer 5:
$$n+2$$
Question 6:
$$\frac{n+1}{(n+1)!}+\frac{n-1}{n!}$$
Answer 6:
$$\frac{1}{(n-1)!}$$
Question 7:
$$\frac{n+1}{(n+1)!}$$
Answer 7:
$$\frac{1}{n!}$$
Question 8:
$$\frac{n\cdot(n-1)!}{n!}$$
Answer 8:
$$1$$
Question 9:
$$\frac{1}{n!}-\frac{1}{(n-1)!}$$
Answer 9:
$$\frac{1-n}{n!}$$