Chapter 10 Example 10.6

Hi guys,

How did they integrate the following:

Integral ( 6 to inf) [ 2 * c * x * e^(-c*(x^2))]

Their answer is: e^(-c*(x^2)) = e^(-36c).

I am so confused....I tried the online integral calc and it gives some error term and is just weird.

Thanks for your input and I really appreciate it!

Cheers.

 

Set: c x^2 = y and substitute in the integrand.
You should get the correct answer