Sum of the first odd numbers

ComputeMathematical induction

Find a closed formula, in terms of $n$ , for the sum of the first $n$ odd numbers:

1 + 3 + 5 + \cdots + (2n - 1).

Enter an expression. Any equivalent form is accepted.

Sum of the first odd numbers · Proofwise

ComputeMathematical induction

Find a closed formula, in terms of $n$ , for the sum of the first $n$ odd numbers:

1 + 3 + 5 + \cdots + (2n - 1).

Enter an expression. Any equivalent form is accepted.