Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

lawls

  • 2 years ago

Find the 7th term of (x^2 + 3y)^9

  • This Question is Closed
  1. amistre64
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    looks like a pascal

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

    given: \[(p+q)^n\] we can work out the middle stuff as:\[p^{n-c}q^c\] the coeeficient is a little tricker unless you know about combinatorics

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

    and c is the "term" value :)

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

    n choose c is what i think i recall for the coeff; or else draw up the pascal triangle

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

    |dw:1358788894374:dw| This is the working formula.

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

    that looks about right, but if i remember it correctly: the first term starts at 9 and drops down till it hits the 7th term

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

    Didn't get you ?

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

    The first term's coefficient is 1 , when r=0,

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

    (a+b)^9 a^9 a^8 a^7 a^6 a^5 a^4 a^3 ^^^ b^0 b^1 b^2 .... b^6 ^^^ these always get turned around in my head

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

    ok thanks

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

    good luck ;)

  12. 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.