INDEFINITE INTEGRALS | INTEGRATION AS REVERSE PROCESS OF DIFFERENTIATION, FUNDAMENTAL INTEGRATION FORMULAE, SOME STANDARD RESULTS ON INTEGRATION, GEOMETRIC SIGNIFICANCE OF INTEGRATION | A function `phi(x)` is called a primitive of `f(x)`; if `phi, Some important formulas of integration, Examples of integration: (i) `x^4` (ii) `3^x`, Theorem: `d/dx(int f(x) dx) = f(x)`, The integral of the product of a constant and a function = the constant x integral of function, `int {f(x) pm g(x)} dx = int f(x) dx pm int g(x) dx`, Geometrical interpretation of indefinite integral, Comparison between differentiation and integration