soal olimpiade

Day 1 (July 8th, 2014) Problem 1 Let $a_0< a_1< a_2< \cdots$ be an infinite sequence of positive integers. Prove that t...

How Does The Rainbow Occur?

After the rain happens sometimes you see the arch of light in the sky that consists of various colors or what we usually call a rainbow! Som...

Definition of Diode

The diode is an electronic component consisting of two poles and functions to rectify the current. This component consists of combining two ...