Respostas

2013-05-24T11:47:14-03:00

(n+1)! + (n+3)!/n! + (n+1)! = 0

0 = 1+n + 3+n/n + 1+n

0= 1+ 3/n + 1 + 3n

0-1-3-1= 3n/n

-4/3 = n/n

n/n = 1,33

n=?

 

n= Raiz 1,33

n=  1,15

2013-05-25T11:47:26-03:00

(n+1/n)=3 --> n+1/n= √3
(n+1/n)=3 --> n+2+1/n=3 --> n+1/n=1 --> n-1+1/n=0

n+ 1/n=(n+1/n) ·(n- 1 + 1/n) = √3·0= 0