Integral Problem: Find Solution to 1/((e^(x-1)+1)) & (x)/((e^(x-1)+1))

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In summary, an integral problem is a mathematical problem that involves finding the area under a curve. To solve it, one must use integration to find the antiderivative of the given function and evaluate it at the limits of the interval. The given function is often used in real-world situations involving rates of change, and the "e" represents the mathematical constant e which helps to create a smoother curve. This problem can be solved both analytically and numerically, with analytical solutions being preferred for their exact values.
  • #1
cragar
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Homework Statement


integrate 1/((e^(x-1)+1))
and (x)/((e^(x-1)+1))





The Attempt at a Solution


i tried using integration parts , and partial fractions but i am not really sure what to do
any help will be much appreciated .
 
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  • #2
I'd start by multiplying both numerator and denominator by [itex]e[/itex]...after that, just use the following trick:

[tex]\frac{e}{e^x+e}=\frac{e+e^x-e^x}{e^x+e}=1-\frac{e^x}{e^x+e}[/tex]
 
  • #3
thanks for you help , that is a really slick trick
 

1. What is an "integral problem"?

An integral problem is a mathematical problem that involves finding the area under a curve. It is also known as a definite integral and is represented by the symbol ∫. In simple terms, it is a way of calculating the total value of a function over a specific interval.

2. How do you find the solution to a given integral problem?

To find the solution to an integral problem, you need to use a technique called integration. This involves finding the antiderivative of the given function and then evaluating it at the limits of the interval. In other words, you need to find the function whose derivative is equal to the given function.

3. What is the given function 1/((e^(x-1)+1)) & (x)/((e^(x-1)+1)) used for?

The given function is known as a rational function and is often used in the field of mathematics and engineering. It is used to model real-world situations that involve rates of change, such as growth, decay, or flow. In this particular problem, the function is used to find the area under a specific curve.

4. What is the significance of the "e" in the given function?

The "e" in the given function represents the mathematical constant e, also known as Euler's number. It is an important constant in calculus and is often used in problems involving exponential growth or decay. In this problem, the "e" in the denominator helps to create a smoother curve, making it easier to find the solution.

5. Can this integral problem be solved analytically or numerically?

Yes, this integral problem can be solved both analytically and numerically. Analytical solutions involve finding the antiderivative and evaluating it at the limits of the interval. Numerical solutions, on the other hand, involve using numerical methods, such as the trapezoidal rule or Simpson's rule, to approximate the value of the integral. Both methods can provide accurate solutions, but analytical solutions are often preferred as they can provide exact values.

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