Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ikoreanx3

  • one year ago

For the functions given, find a) (f*g)(x) b) (f*g)(2) f(x)=x-3, g(x)=x+6 a) (f*g)(x) = ? b) (f*g)(2)= ?

  • This Question is Closed
  1. jdoe0001
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so, multiply them then

  2. johnanon93
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so here, you literally just plug in those functions wherever you see f(x) and g(x) example (f*g)(x) you have an f(x), and you have a g(x)...plug them in (x - 3) * (x + 6) can you do this?

  3. ikoreanx3
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    x^2+3x-18?

  4. johnanon93
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    correct...that would be your a) now for b) you have (f*g)(2) ....notice how the (2) is where the (x) was before....so what do you think you do with that 2?

  5. ikoreanx3
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so it is written (x-3)*(x+6)(2)?

  6. johnanon93
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no not quite...where you see that (2) is exactly where you saw the (x) ....did you write the other one as (x-3)*(x+6)(x)? no because that wouldn't have worked. instead you used that (x) and you plugged it in for every x you saw in the equation a.k.a (x - 3)*(x + 6) **same right? so now....you would plug (2) in for EVERY "x" you see in the equation you derived from finding (f*g)(x) remember how you had gotten x² + 3x - 18 now...you would plug 2 into that equation wherever you see an "x"

  7. ikoreanx3
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So then... it would be (2)^2+3(2)-18 =

  8. ikoreanx3
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    = -8?

  9. johnanon93
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    correct! :)

  10. ikoreanx3
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you so much :)

  11. johnanon93
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no problem!

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.