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

3psilon Group Title

Why is 3^20 + 3^20 + 3^20 == 3^21 ??!? I'm so confused

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. TuringTest Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    3^20+3^20+3^20 combine like terms... =3(3^20)=3^(20+1)=3^21

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

    |dw:1344353759006:dw|

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

    @3psilon let me know if you still don't get it...

    • 2 years ago
  4. 3psilon Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    So you're factoring out the 3?

    • 2 years ago
  5. 3psilon Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Not sure how you go tto 3^(20+1)

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

    no, I am combining like terms call\[(3^{20})=x\]we then have\[(3^{20})+(3^{20})+(3^{20})=x+x+x=3x\]sub back in what we know x is...\[3x=3(3^{20})\]now we use the property\[x^a\cdot x^b=x^{a+b}\]and get\[3(3^{20})=3^1\cdot3^{20}=3^{20+1}=3^{21} \]

    • 2 years ago
  7. 3psilon Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    OHHHH

    • 2 years ago
  8. 3psilon Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes! I thought I got it last night, but then I saw this problem and was embarrassed to ask again. Thank you turing

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

    very welcome! please never be too embarrassed to ask

    • 2 years ago
  10. 3psilon Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I won't! You will see me more often! haahaha have a good one

    • 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.