Question

Fatorial ;

Calcule :

A) 15! + 12 / 14!

B) 9! . 7! / 5! . 5!

Answer 1

  {15!13!}{14!12!} = \{15.14!13.12!}{14!12"} =15.13 =195 \\  \\  \12!3!}{15!} = \12!3!}{15.14.13.12!} = \{3.2.1}{15.14.13} = \{1}{455}  

               {3!-0!}{3!2!} = \{3.2.1-1}{3.2.1.2.1} = \{5}{12} ,

espero ter ajudaduh