Question

calcule n na expressão abaixo : n!+(n-1)/(n+1)! = 1/6

Answer 1

n!+(n-1)!/n!+1=1/6
n!+n!-1=1/6(n!+1)
2n!-1=n!/6+1/6
6(2n!-1)=n!+1
12n!-6=n!+1
11n!=7
n!=7/11