Question

“三個連續的奇數的平方和”的表達式為(n為整數)

1. A.
   (n-1)²+n²+(n+1)²
2. B.
   n²+(n+1)²+(n+2)²
3. C.
   2n²+(2n+1)²+(2n+3)²
4. D.
   (2n-1)²+(2n+1)²+(2n+3)²

Answer 1

D