數學代數題

1.The smallest number of three consecutive number is 'W'.
So, the next number of three consecutive number is 'W+1'.
And, the biggest number of three consecutive numer is 'W+2'.
Therefore, the sum of the three consecutive number
=W+(W+1)+(W+2)
=3W+3
2.The smallest number of three consecutive odd numbers is 2n+1.
So, the next number of the three consecutive old numbers is 2n+1+2=2n+3.
The biggest number of the odd consecutive old number is 2n+3+2=2n+5.
Therefore, the sum of the three odd consecutive number
=2n+1+2n+3+2n+5
=6n+8

1.
W + (W+1) + (W+2) = 3W+3
2.
(2n+1) + (2n+3) + (2n+5) = 6n+9