### What is CALCULUS and Why we study CALCULUS?

*What is CALCULUS:*

**CALCULUS** is a branch of Mathematics in which we study how things change and the rate at which things change. **CALCULUS** was developed in the later half of 17th century by two great mathematicians, **Isaac Newton** and **Gottfried Leibniz**. Now a days, **CALCULUS** has widespread uses in science, engineering and economics and can solve many problems that elementary algebra alone cannot. **CALCULUS** deals with the instantaneous rate change of continuously varying quantities, areas under curves, and sequences and series etc.