A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Need help on the next step of this definite integral
anonymous
 4 years ago
Need help on the next step of this definite integral

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\int\limits_{1}^{2} 3x/\sqrt{4x+5} dx\] I used the usub of sqrt{4x+5}, u^2=4x+5 got 2udu=4dx and then udu=2dx. I feel like the next step is right in front of my eyes but I'm just not seeing it

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.0when you sub in for dx, the u will cancel with the sqrt(4x+5) since it is equal to u replace x with (u^2 5)/4 \[\rightarrow \frac{3}{8}\int\limits_{1}^{2}(u^{2}5) du\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Can I just pull the 3 out from the x like that?

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.0oh sorry i didn't see you responded yes you can, anytime it is a constant \[\int\limits_{?}^{?}n*x dx= n \int\limits_{?}^{?}x dx\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0np, gave me time to try to figure it all out, lol.
Ask your own question
Sign UpFind more explanations on OpenStudy
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.