# What is the algebraic expression for the sum of three consecutive integer?

##### 1 Answer

Oct 16, 2015

#### Answer:

Sum of three consecutive integer number is 3 times the middle value: That is 3n given that the mean number is n.

#### Explanation:

Let any integer number be n

Then the number 1 less than it is n-1

Also the number 1 more than it is n+1

So the sum is

Adding these we have

So the final sum is

Note: the mean value is