Question

Se ( n + 1 )! = 10n!, então ( n - 1 )2 vale:

a)64
b)81
c)100
d) 36
e) 25

Answer 1

Se ( n+ 1 ) = 10n
Logo ( n - 1 )2 será igual a :
a)64
b)81
c)100
d)36
 >>> e) 25 <<<