Hello peeps,
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.
1st way:
2nd way
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?
not necessarily. sometimes the result of the same integral can have hugely different forms depending on what integration technique you use. often you can simplify one form to get the other, but sometimes you can't, the difference is absorbed in the arbitrary constant.
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.