Coba jelasin Ngitung integrals dari Integral dalam bahasa sunda dong

The most basic technique for computing integrals of one réal variable is based on the Fundamental Theorem of Calculus.  It proceeds like this:

Choose a function f(x) and an interval [a,b].

Find an antiderivative of f, that is, a function F such that F' =f.

By the Fundamental Théorem of Calculus, .

Therefore the value of the integral is F(b)-F(a).

Note that the integral is not actually the antiderivative (it is a number), but the fundamental théorem allows us to use antiderivatives to evaluate integrals.

The difficult step is finding an antiderivative of f.  It is rarely possible to glance at a function and write down its antiderivative.  More often, it is necessary to use one of the many techniques that have been developed to evaluate integrals.  Most of these techniques rewrite one integral as a different one which is hopefully more tractable.  Techniques include: