# How to do this integral?

• jkh4
In summary, the limits of integration for a given integral can be determined by identifying points where the function changes behavior. Definite and indefinite integrals differ in their use of limits and result in a numerical value or function, respectively. The substitution method involves replacing a part of the integral with a new variable. While some calculators have built-in functions for integration, it is important to understand the underlying concepts. Some techniques, such as integration by parts and partial fractions, may make solving certain integrals easier, but there is no universal shortcut for all integrals.

#### jkh4

How to do this integral?

dy/dx = (y^2 - 1)/x

a) Give the general equation of the curves that satisfy this equation

b) Show that the straight lines y=1 and y=-1 are also solutions.

Thank you!

dy/(y^2-1)=xdx
Proceed from there (integrate).

b) what is the derivative of a straight line? is it equal to what the diff eq tells you about it?

## 1. How do I determine the limits of integration for a given integral?

The limits of integration for an integral can be determined by looking at the given function and identifying the points where the function changes behavior, such as where it crosses the x-axis or where it has a discontinuity. These points will serve as the lower and upper limits of integration.

## 2. What is the difference between definite and indefinite integrals?

A definite integral has specific limits of integration and gives a numerical value as a result, while an indefinite integral does not have limits and gives a function as a result. Essentially, a definite integral calculates the area under a curve, while an indefinite integral finds the original function given its derivative.

## 3. How do I evaluate an integral using the substitution method?

The substitution method involves replacing a part of the integral with a new variable, such as u or x^2, and then using the chain rule to find the derivative of the new variable. This allows for the integral to be simplified and evaluated using basic integration rules.

## 4. Can I use a calculator to solve integrals?

Some calculators have built-in functions for solving integrals, but it is important to understand the underlying concepts and methods of integration in order to use a calculator accurately. Additionally, certain integrals may not be solvable with a calculator and require manual techniques.

## 5. Are there any shortcuts or tricks for solving integrals?

There are a few techniques, such as integration by parts and partial fractions, that can make solving certain integrals easier. However, there is no universal shortcut for solving all integrals and it is important to have a strong understanding of integration techniques and rules.

• Calculus
Replies
12
Views
1K
• Calculus
Replies
20
Views
2K
• Calculus
Replies
1
Views
695
• Calculus
Replies
11
Views
2K
• Calculus
Replies
2
Views
71
• Calculus
Replies
1
Views
1K
• Calculus
Replies
4
Views
1K
• Calculus
Replies
2
Views
894
• Calculus
Replies
3
Views
111
• Calculus
Replies
2
Views
2K