Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
How to integrate (62x)^2 . (indefinite integral). I'm trying U sub but Idk what I'm doing wrong
 one year ago
 one year ago
How to integrate (62x)^2 . (indefinite integral). I'm trying U sub but Idk what I'm doing wrong
 one year ago
 one year ago

This Question is Closed

TuringTestBest ResponseYou've already chosen the best response.1
what did you use for u ?
 one year ago

TuringTestBest ResponseYou've already chosen the best response.1
can you show your sork? what did you get for du? what did you get for dx?
 one year ago

3psilonBest ResponseYou've already chosen the best response.1
U = 62x du = 2dx \[(1/2) \int\limits_{}^{} 2U^2dx\] @TuringTest
 one year ago

TuringTestBest ResponseYou've already chosen the best response.1
I'm not seeing where you get the 2 from... u=62x du=2dx > dx=du/2
 one year ago

3psilonBest ResponseYou've already chosen the best response.1
It's to get du right ? so I multiply by 1 pretty much 2/2
 one year ago

TuringTestBest ResponseYou've already chosen the best response.1
you have left your integral all mixed up with u integrated with respect to x; you can't do that. I think you are getting confused there. you need to sub in the values: u=62x du=2dx > dx=du/2 subbing in for u and dx gives\[\int u^2(\frac{du}2)=\frac12\int u^2du\]
 one year ago

3psilonBest ResponseYou've already chosen the best response.1
Ohhh thank you turing!
 one year ago

3psilonBest ResponseYou've already chosen the best response.1
We weren't taught how to solve for dx and plug back in but I like that way!
 one year ago

TuringTestBest ResponseYou've already chosen the best response.1
I sort of never saw them do it in class that way either, I never understood why :p
 one year ago

3psilonBest ResponseYou've already chosen the best response.1
@TuringTest What answer are you getting ? I get \[\frac{(62x)^{3}}{6} +c\] But my TI89 is giving me\[\frac{4(x3)^{3}}{3} +C\]
 one year ago

TuringTestBest ResponseYou've already chosen the best response.1
it is the same answer; they appear to have factored out a 2 in your TI89
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.