Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

My15girl

  • 2 years ago

This is discrete functions. Can someone please help?? I can't figure out what I am doing wrong. I am supposed to get the indicated sum, but I keep doing something wrong. This is what series I have to work with x[15] for 0.3+0.003+0.00003+...... I know that a=0.3 and r=0.01 and n=15. so x[n] = a(r^n-1)/r-1 x[n] = 0.3((0.01)^15-1)/0.3-1 x[n] = 0.3((-1))/-7/10 but the outcome is 3/7. Is that the right outcome because the back of my text book says it's 10/33. And I don't understand what I am doing wrong. :/

  • This Question is Closed
  1. klimenkov
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    What is \(0.01^{15}\)?

  2. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    that would be the common ratio or "r" to the exponent number of terms or "n"

  3. klimenkov
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Can you calculate this?

  4. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, when I calculate it I get 1.E-30, then I subtract 1 and get -1

  5. klimenkov
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    There is a mistake in the denominator. x[n] = 0.3((0.01)^15-1)/0.3-1

  6. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh

  7. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wow, I am so clueless

  8. klimenkov
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Actually, there are two mistakes.

  9. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay I see where I went wrong. Wow

  10. My15girl
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you so much :)

  11. 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.