Rules of Integration

# Rules of Integration Video Lecture | Physics for JEE Main & Advanced

## Physics for JEE Main & Advanced

335 videos|841 docs|218 tests

## FAQs on Rules of Integration Video Lecture - Physics for JEE Main & Advanced

 1. What are the basic rules of integration?
Ans. The basic rules of integration include the power rule, constant rule, sum rule, and substitution rule. The power rule states that when integrating a function of the form x^n, where n is any real number except -1, the resulting integral is (1/(n+1)) * x^(n+1). The constant rule states that when integrating a constant multiplied by a function, the constant can be brought outside the integral. The sum rule states that when integrating the sum of two or more functions, the integral of each function can be taken separately and then added. The substitution rule is a technique to simplify integrals by substituting a new variable for the original variable.
 2. How do I use the power rule in integration?
Ans. The power rule in integration is used to find the antiderivative of a function of the form x^n. To use the power rule, add 1 to the exponent and divide the result by the new exponent. For example, when integrating x^3, the power rule gives us (1/4) * x^4. Similarly, when integrating x^2, the power rule gives us (1/3) * x^3. However, it's important to note that the power rule is not applicable when the exponent is -1.
 3. Can you explain the constant rule in integration?
Ans. The constant rule in integration allows us to bring a constant outside the integral when integrating a constant multiplied by a function. For example, when integrating 5x, the constant rule states that we can write it as 5 times the integral of x, which simplifies to 5 * (1/2) * x^2 + C, where C is the constant of integration. This rule is useful when integrating polynomials or functions that involve constants.
 4. How does the sum rule work in integration?
Ans. The sum rule in integration allows us to integrate the sum of two or more functions by integrating each function separately and then adding the results. For example, if we have the function f(x) = x^2 + 3x, we can use the sum rule to find its integral. The integral of x^2 is (1/3) * x^3, and the integral of 3x is (3/2) * x^2. Adding these two results gives us the integral of f(x) as (1/3) * x^3 + (3/2) * x^2 + C, where C is the constant of integration.
 5. How do I apply the substitution rule in integration?
Ans. The substitution rule in integration is a technique used to simplify integrals by substituting a new variable for the original variable. The main idea is to choose a suitable substitution that simplifies the integral. The steps to apply the substitution rule are as follows: 1) Identify a suitable substitution, 2) Compute the derivative of the substitution variable, 3) Rewrite the integral in terms of the new variable, 4) Evaluate the integral with respect to the new variable, and 5) Substitute the original variable back into the result. This technique is particularly useful for integrals involving complicated functions or trigonometric functions.

## Physics for JEE Main & Advanced

335 videos|841 docs|218 tests

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