# How do you write the algebraic expression for "the sum on two consecutive number"?

Sep 23, 2015

$2 k + 1$, $\left(k \in \mathbb{N}\right)$
Denoting some natural number by $k$, the next largest consecutive number may be denoted by $k + 1$.
Their sum will be $k + \left(k + 1\right) = 2 k + 1$
(where $k$ is an element of the natural numbers, which are conventionally denoted by $\mathbb{N}$, as noted in parentheses in the brief summary answer above)