Solving a Stubborn Integral Problem

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However, both answers are equivalent up to a constant value of -2 ln(2). Therefore, both methods are correct and it just depends on personal preference and the method used by the software. In summary, the two methods for calculating the integral are equivalent up to a constant value of -2 ln(2), making both methods correct.
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boa_co
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Homework Statement


I have to integrate

[PLAIN]http://img69.imageshack.us/img69/4259/integral1.gif

The Attempt at a Solution



This is how I did it

[PLAIN]http://img338.imageshack.us/img338/5508/integral12.gif

wolfram says it is supposed to turnout like this

[PLAIN]http://img690.imageshack.us/img690/1462/integral13.gif

Where does the extra 2 in the log come from?

Thanks
 
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The answers are actually the same, up to a constant -2 ln(2).

With logarithms this is always tricky, because they satisfy
[tex]\ln(a \cdot b) = \ln(a) + \ln(b)[/tex]

Apparently Wolfram Alpha / Mathematica uses some other method to calculate the integral in which the 2 inside the log appear naturally.
 

What is a stubborn integral problem?

A stubborn integral problem is a type of mathematical problem that involves finding the exact value of an integral (a mathematical function that calculates the area under a curve) that cannot be solved using traditional methods. These problems often require advanced techniques or clever manipulations to find a solution.

How do you approach solving a stubborn integral problem?

There are several strategies that can be used to solve a stubborn integral problem. These include integration by parts, substitution, trigonometric identities, and partial fraction decomposition. It is important to carefully analyze the problem and determine which technique will be most effective.

What are some common mistakes to avoid when solving a stubborn integral problem?

One common mistake when solving a stubborn integral problem is not checking for algebraic errors. These errors can often lead to incorrect solutions. It is also important to be aware of any special properties or identities that may apply to the integral, as overlooking these can make the problem more difficult to solve.

Can technology be used to solve stubborn integral problems?

Yes, technology such as graphing calculators or computer software can be used to solve stubborn integral problems. These tools can quickly perform complex calculations and graph the results, making it easier to analyze and understand the problem.

Why are stubborn integral problems important in science?

Stubborn integral problems are important in science because they allow us to model and understand various physical phenomena. They are used in a wide range of scientific fields, including physics, engineering, and economics, to calculate quantities such as displacement, velocity, and work. Solving these problems helps us gain a deeper understanding of the natural world and make accurate predictions about its behavior.

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