June 01, 2019 Muktaka Joshipura

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Square Numbers

We all know about numbers that form squares, we often call them square numbers.

For any natural number $n$, the $n$^th square number is $n^2$.

For the uninitiated, $n^2={\int }_0^n\frac{x}{2}dx$

Triangle numbers

These are numbers that can be arranged into triangles. This is also the sum of the first $n$ consecutive natural numbers.

$$\sum _{i=1}^{n}i=\frac{n(n-1)}{2}$$

Also, $$1.5\in R$$