Question

Determine n para (n+1) x (1+1) x (n+1)

Answer 1

(n+1) x (1+1) x (n+1)= 
(n + n +1 + 1) x (n+1)=
(2n + 2) x (n+1) =
2n² + 2n + 2n + 2 = 
2n² + 4n + 2 = 0 (:2)
 n² + 2n + 1 = 0
Δ= 4 - 4 = 0

n = -2/2 = -1 <--- valor de n