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anonymous

  • 5 years ago

Given f(x)=2x+3 and g(x)=1/2(x-3), find the each composition. I am confuse how to set then up.

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  1. anonymous
    • 5 years ago
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    a composition is f(g(x)) nd g(f(x)), where you substitute the whole other function for x

  2. anonymous
    • 5 years ago
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    yeah,

  3. anonymous
    • 5 years ago
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    you start from the inside to the outside, but i still confuse how to set them up.

  4. amistre64
    • 5 years ago
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    f(g(x)) = 2(g(x)) + 3

  5. anonymous
    • 5 years ago
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    f(x)=2x+3 and g(x)=1/2(x-3), f(g(x) = 2(g(x)) + 3 f(g(x) = 2(1/2(x-3)) +3

  6. amistre64
    • 5 years ago
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    g(f(x)) = 1/2(f(x)-3)

  7. anonymous
    • 5 years ago
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    lol, amistre you fail

  8. amistre64
    • 5 years ago
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    :) how so?

  9. anonymous
    • 5 years ago
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    i just confuse, i need steps

  10. anonymous
    • 5 years ago
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    you just write something them leave.

  11. amistre64
    • 5 years ago
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    is there a time limt to wait around for a response? or am i allowed to come back after a response has been given? ;)

  12. amistre64
    • 5 years ago
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    i figure with 352 medals, i might be doing something right lol

  13. anonymous
    • 5 years ago
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    should we set one?

  14. anonymous
    • 5 years ago
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    WB, which steps do you get? That'd be a good start

  15. anonymous
    • 5 years ago
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    ok, so plz do step this time.

  16. anonymous
    • 5 years ago
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    the beginning,

  17. amistre64
    • 5 years ago
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    those are the steps; plug the one into the other; thats all there is to it.

  18. anonymous
    • 5 years ago
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    what you plug?

  19. amistre64
    • 5 years ago
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    f(x) = 2x+3 means that 'whatever' x equals, plug it in. f(g(x)) simply means that x = g(x)

  20. anonymous
    • 5 years ago
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    f(x)=2x+3 and g(x)=1/2(x-3), f(g(x) = 2(g(x)) + 3 f(g(x) = 2(1/2(x-3)) +3 g(f(x)) = 1/2(f(x)-3) g(f(x)) = 1/2(2x+3)-3) then simplify by working out how to remove the parentheses

  21. amistre64
    • 5 years ago
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    f(g(x)) = 2(g(x)) +3

  22. anonymous
    • 5 years ago
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    ah, got it. thx tonks

  23. anonymous
    • 5 years ago
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    all set, then I'm going to go now...jk ;)

  24. amistre64
    • 5 years ago
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    f(w) = 2(x) + 3 f(4) = 2(4) + 3 f(applesause) = 2(applesauce) + 3 f(g(x)) = 2(g(x)) + 3 lol

  25. amistre64
    • 5 years ago
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    ...typed that lol

  26. anonymous
    • 5 years ago
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    wait, i have a similar problem, bvut much harder.

  27. anonymous
    • 5 years ago
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    the was just the start. and i got he answer, my prof did it on the board.

  28. amistre64
    • 5 years ago
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    Tonks has it ;)

  29. anonymous
    • 5 years ago
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    thx amistre

  30. anonymous
    • 5 years ago
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    WB, post it as a new question, it is easier to find that way

  31. anonymous
    • 5 years ago
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    f(x)=-7/2x -3 g(x)=-2x+6/7

  32. anonymous
    • 5 years ago
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    this one is much harder.

  33. anonymous
    • 5 years ago
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    WB, there's a new thread with this posted, check it out...

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