Question

What is integration? What is differenciation? What do we actually do by doing that?Explain please

Answer 1

Integration is the inverse of differentiation.
Differentiation is the inverse of integration.

Answer 2

Differentiation, in a nutshell, is getting the rate of change of one variable, with respect to another. In effect, dy/dx is simply how quickly y changes given a change in x.

Answer 3

Graphically, the derivative is the slope of the tangent line at a point. The steeper, the bigger, of course.
Make do with this, I suck at drawing!