A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1use the chain rule ley u = 3x^2 + 6x + 5 , then y = u^(7/2) find du/dx and dy/du then dy/dx = dy/du * du/dx

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1ok  and what did you get?

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.17/2(3x^2 + 6x + 5)^(5/2) * (6x +6)

DLS
 2 years ago
Best ResponseYou've already chosen the best response.0Im little confused.. Will it be like this? \[y=\frac{(3x^{2}+6x+5)^{7/2}}{d(6x+5)} \times \frac{d(6x+5)}{d5} \] something like this? perhaps confused..

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1y = u^(7/2) dy/du = (7/2) u^(7/2  1) = (7/2) u^(5/2) substituting back for u dy/du = (7/2) ( 3x^2 + 6x + 5)^(5/2) du/dx = 6x + 6 now multiply the two results together gives (7/2)(6x+6)(3x^2 + 6x + 5)^(5/2)

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1with practice you won't need to do the substitution u

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.16x + 6 is the derivative of 3x^2 + 6x + 5 the du/dx in the above post

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1you use chain rule when you have a 'function of a function' like this one 3x^2 +6x + 5 is the 'inside' function of (3x^2 +6x + 5)^7/2

DLS
 2 years ago
Best ResponseYou've already chosen the best response.0i have some more questions im confused with!

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.1i'm sorry but i must go now
Ask your own question
Ask a QuestionFind 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.