Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

zurf Group Title

Find the derivative of f(x) = -cos (2x^2-3)

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you know how to use the chain rule?

    • 2 years ago
  2. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah yes i do

    • 2 years ago
  3. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Well your inner function is \(2x^2-3\) and your outer function is \(-\cos(x)\). There shouldn't be anything hard about this.

    • 2 years ago
  4. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    do we have to use chain rule ? i'm confused on what we should do when with the -cos

    • 2 years ago
  5. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    The - is just \(-1\cdot \cos(x)\). It's a constant. You can pull it out and put it back in after.

    • 2 years ago
  6. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    oh really? but this have to use f(x+h)-f(x) first derivation ..

    • 2 years ago
  7. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    You have to use this you mean? \[\Large \lim_{h\rightarrow 0}\frac{f(x+h)-f(x)}{h}\]

    • 2 years ago
  8. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    You're not allowed to use the chain rule?

    • 2 years ago
  9. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh sorry, i just realised it only has to use chain rule. I make things go more complicated -_-

    • 2 years ago
  10. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    So can you do it now?

    • 2 years ago
  11. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah the answer is sin(2x^2-3)(4x) right ?

    • 2 years ago
  12. RadEn Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah, i agree that

    • 2 years ago
  13. zurf Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh thank you so much :D

    • 2 years ago
  14. wio Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    It's correct.

    • 2 years ago
    • Attachments:

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.