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Introduction of Integrals

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Estimated time: 5 minutes
CBSE: Class 12

Introduction

Integral calculus is a branch of mathematics that develops from two main ideas: finding a function when its derivative is known, and finding the area under a curve. 

In simple words, differentiation tells how a quantity is changing, while integration helps recover the original quantity or measure the total accumulation of that quantity. The chapter introduces anti-derivatives, indefinite integrals, definite integrals, and the basic idea that these are connected through the Fundamental Theorem of Calculus.

CBSE: Class 12

Definition: Indefinite Integral

The collection of all anti-derivatives of a function is called its indefinite integral.

\[\int f(x) dx = F(x) + C\]

Here: f(x) = integrand, dx = variable of integration, C = constant of integration.

CBSE: Class 12

Definition: Definite Integral

A definite integral is connected with finding the area under a curve over a given interval. The chapter introduction presents area as one of the central motivating ideas behind integral calculus.

\[\int_{a}^{b} f(x) dx\]
CBSE: Class 12

Key Points: Introduction of Integrals

  • Primitive
    Another name for anti-derivative.
  • Indefinite Integral
    The family of all anti-derivatives of a function.
  • Definite Integral
    An integral taken between two fixed limits, commonly used to represent area or total accumulation.
  • Integral Calculus
    The branch of calculus dealing with anti-derivatives, accumulation, and areas under curves.

Video Tutorials

We have provided more than 1 series of video tutorials for some topics to help you get a better understanding of the topic.

Series 1


Series 2


Series 3


Shaalaa.com | Integrals part 1 (Introduction)

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Integrals part 1 (Introduction) [00:12:37]
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