Math Problem Statement

solve 2x/2x2+2 integrla

Solution

It seems like you're asking to solve the integral of the function 2x2x2+2\frac{2x}{2x^2 + 2}. I'll go step by step to solve this:

Step 1: Simplify the integrand

The given integral is:

2x2x2+2dx\int \frac{2x}{2x^2 + 2} \, dx

First, factor out the common factor of 2 from the denominator:

2x2(x2+1)dx\int \frac{2x}{2(x^2 + 1)} \, dx

Now the integral becomes:

122xx2+1dx\frac{1}{2} \int \frac{2x}{x^2 + 1} \, dx

Step 2: Use substitution

This is a straightforward integral that can be solved using substitution. Let:

u=x2+1u = x^2 + 1

Then, the derivative of uu with respect to xx is:

du=2xdxdu = 2x \, dx

Thus, the integral becomes:

12duu\frac{1}{2} \int \frac{du}{u}

Step 3: Integrate

The integral of 1u\frac{1}{u} is lnu\ln|u|. So, we have:

12lnu+C\frac{1}{2} \ln|u| + C

Step 4: Substitute back uu

Since u=x2+1u = x^2 + 1, substitute back:

12lnx2+1+C\frac{1}{2} \ln|x^2 + 1| + C

Thus, the final answer is:

12ln(x2+1)+C\frac{1}{2} \ln(x^2 + 1) + C

Final Answer:

2x2x2+2dx=12ln(x2+1)+C\int \frac{2x}{2x^2 + 2} \, dx = \frac{1}{2} \ln(x^2 + 1) + C

Would you like further details or clarification on any of the steps? Here are some additional questions that could help expand your understanding:

  1. What is the process for solving integrals with trigonometric functions, like 1x2+1\frac{1}{x^2 + 1}?
  2. Can you explain why substitution works in this case and how to recognize when it's necessary?
  3. How would you solve an integral with a higher-degree polynomial in the denominator?
  4. What are some other methods to solve integrals that cannot be simplified directly?
  5. How would you approach an integral involving a rational function with an exponential term?

Tip: When integrating functions of the form 1x2+a2\frac{1}{x^2 + a^2}, you can use the formula 1x2+a2dx=1atan1(xa)+C\int \frac{1}{x^2 + a^2} \, dx = \frac{1}{a} \tan^{-1}\left(\frac{x}{a}\right) + C, which simplifies the process!

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Math Problem Analysis

Mathematical Concepts

Calculus
Integration
Substitution

Formulas

\int \frac{1}{x^2 + a^2} \, dx = \frac{1}{a} \tan^{-1}\left(\frac{x}{a}\right) + C

Theorems

Substitution method in integration

Suitable Grade Level

Grades 11-12