factorial notation

Can a factorial be defined for a negative number?

• YES

• NO

Express in factorial form: $6\times5\times4\times3\times2\times1$   

Express in factorial form:  $8\times7\times6\times5\times4\times3\times2\times1$  

Express in factorial form:  $3\times2\times1$  

Solve: $\frac{14!}{13!}$   

• 14!

• 13!

• 14

• 13

Solve: $\frac{101!}{99!}$  

• 101!

• 101

• 99

• 10100

Solve: $20\times19!$   

• 20!

• 19!

• 21!

• 380!

Solve: $90\times8!$  

• 98!

• 720

• 10!

• no answer

solve: $\frac{19!}{13!}$  

solve: $\frac{21!}{17!4!}$