Question

The sum of first $$n$$ natural numbers is ______.

Options

• $$\frac{n(n - 1)}{2}$$

• $$\frac{n(n + 1)}{2}$$

• $$\frac{n(n + 2)}{2}$$

• $$\frac{n(n - 2)}{2}$$

Answer 1

The sum of first $$n$$ natural numbers is `underlinebb((n(n + 1))/2)`.

Explanation:

The sum of the first $$n$$ natural numbers is $$1 + 2 + \cdots + n = \frac{n(n + 1)}{2}$$.