A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

Why is 13 and -5 the wrong answer?

  • This Question is Closed
  1. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ill type it out if you cant see it

  3. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cant see it

  4. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    where did you get the 13 from?

  5. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    take the derivative, replace x by 1 and you should get 10 if i am not mistaken

  6. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    For the function f(x) = 5x^2+3, find the equation of the tangent line to the graph of f at x=1. If the equation of the tangent line is written as: y=mx+b, what are m and b? m= b=

  7. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    find f(1) to establish the point and find f'(1) to establish a slope

  8. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then y = mx + b y = f'(1)x -f'(1)+f(1)

  9. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i got 13 by getting 10(1)+3

  10. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    5(1)+3 = 8

  11. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    5(1^2) not= 10

  12. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ..... youre talking the derivative tho lol

  13. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    derivative of 5x^2+3 is 10x 10(1) = 10

  14. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i am going to guess that the mistake was in taking the derivative and getting \[y'=10x+3\] instead of the correct \[y'=10x\] just a guess

  15. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y = 10x -10+8 y = 10x -2

  16. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what amistre said

  17. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah my mistake was that i kept the 3 after taking the derivative

  18. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[D_x[5x^2+3]=Dx[5x^2]+Dx[3]=10x + 0\]

  19. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

  20. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.