Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Pre calc problem

  1. Sep 2, 2004 #1
    F(X) = x^2 + 2; G(X) = x - 3

    F times G

    Now, I dont know if this problem is different but for the times sign for F times G, its an open circle, its not solid.

    Answer is (x - 3)^2 + 2 or x^2 - 6x + 11
     
  2. jcsd
  3. Sep 2, 2004 #2
    Given [tex]f(x) = x^2 + 2[/tex] and [tex]g(x) = x-3[/tex] Find [tex]fg(x)[/tex] which is not quite the same as f(x)*g(x). You're supposed to find the composite function fg(x). I don't see the problem.
     
  4. Sep 2, 2004 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    FoG(x) is defined as F(G(x)).

    Since F(X) = x^2 + 2 and G(X) = x - 3,
    F(G(x))= F(x-3)= (x-3)^2+ 2.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Pre calc problem
  1. Pre calc, domain sets (Replies: 2)

  2. Very basic pre-calc (Replies: 5)

  3. Pre calc problem (Replies: 3)

  4. Pre calc problem (Replies: 1)

  5. Pre calc (Replies: 2)

Loading...