Integrating e^(x^2)dx: Tips and Tricks for Solving Diff Eq Problems

In summary, the conversation discusses getting stuck on evaluating the integral of e^(x^2)dx and ideas for solving it, including using a double integral or integrating its polynomial expansion.
  • #1
itzela
34
0
I'm doing a diff eq problem and I got stuck on the part where I have to integrate
e^(x^2)dx. I tried using substitution but that didn't work :confused: ... any ideas?
 
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  • #2
There's a good reason why you're getting stuck - there is no simple expression for the integral you're trying to evaluate.
 
  • #3
itzela said:
I'm doing a diff eq problem and I got stuck on the part where I have to integrate
e^(x^2)dx. I tried using substitution but that didn't work :confused: ... any ideas?

if it is definite integral you can evaluate by double integral and transformation to polar. if it is indefinite, a good way to evaluate it is integrate its polynomial expansion. but itself doesn't have an antiderivative
 
  • #4
Got it =) Thanks for pointing me in that direction.
 

FAQ: Integrating e^(x^2)dx: Tips and Tricks for Solving Diff Eq Problems

What is the general approach to integrating e^(x^2)dx?

The general approach to integrating e^(x^2)dx is to use a combination of techniques, such as u-substitution and integration by parts, to simplify the integral and solve for the antiderivative. It may also be helpful to use trigonometric or logarithmic identities to simplify the expression.

What is the significance of e^(x^2)dx in solving differential equation problems?

e^(x^2)dx is a common function that appears in many differential equation problems, especially those involving growth and decay. Its integration can help solve for the general solution of the differential equation and provide insight into the behavior of the system.

Are there any special properties of e^(x^2)dx that can make integration easier?

One special property of e^(x^2)dx is that it is an even function, meaning that it is symmetric about the y-axis. This can be useful in certain integration techniques, such as integration by parts, as it allows for the cancellation of terms to simplify the integral.

How can I check my work when integrating e^(x^2)dx?

One way to check your work when integrating e^(x^2)dx is to take the derivative of your antiderivative and see if it equals the original integrand. You can also use online integration calculators or graphing software to plot the function and see if it matches your solution.

Can you provide any tips or tricks for solving difficult integrals involving e^(x^2)dx?

One tip for solving difficult integrals involving e^(x^2)dx is to try different substitution strategies, such as letting u = x^2 or u = e^(x^2). You can also try manipulating the expression using algebraic techniques, such as completing the square or using trigonometric identities. Additionally, practicing and familiarizing yourself with common integrals involving e^(x^2)dx can help you recognize patterns and approaches to solving them.

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