What I need help on is clarifying if the answer for this integral is correct because I have did it in two ways and I'm not sure if both of them are correct.
for the square root I have:
From here I did the equation 2 ways, please let me know if one of the ways is incorrect.
How you get (9-u) from x^3?
Also, the problems are from a textbook and is on the section of trig. substitution.
First time using the math tags, took me half hour to do the first post =[
rats, didn't see the sign error, other than that the steps were fine?
we just need to take it step by step here and make sure ff4930 made no errors. which i am pointing out has he goes along...
i agreeSometimes, trigs. substitutions are really cool, but it depends of the integral, of course.
Thanks guys, I really appreciate your help.
I've had this math professor since calculus 1 and he has always let us student leave the answer in such a mess and does not require us to simplify the answer. So now I'm so used to just to leaving a really long answer and not bother simplifying.