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Shido88

  • 3 years ago

f(x)= 2x/x+3 and g(x)=5/x find: (f o g)(x) ?

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  1. Shido88
    • 3 years ago
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    @marsss

  2. Shido88
    • 3 years ago
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    hey @Mertsj :D

  3. Mertsj
    • 3 years ago
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    f composite g means to replace each x in the function f with the function g

  4. Shido88
    • 3 years ago
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    2(5/x) / (5/x)+3 right ?

  5. CanadianAsian
    • 3 years ago
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    f o g means f(g(x)) if g(x) = 5/x and f(x) = 2x/(x+3) Then f o g = 2(5/x)/(5/x + 3)

  6. Mertsj
    • 3 years ago
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    |dw:1359320337310:dw|

  7. Shido88
    • 3 years ago
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    ok cool :) but I'm stuck from there...

  8. Mertsj
    • 3 years ago
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    |dw:1359320391800:dw|

  9. Mertsj
    • 3 years ago
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    Multiply numerator and denominator by x to simplify the complex fraction.

  10. Shido88
    • 3 years ago
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    10/x / 3+5/x ?

  11. Mertsj
    • 3 years ago
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    |dw:1359320436709:dw|

  12. Shido88
    • 3 years ago
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    isn't it suppose to be 10/x ?

  13. Shido88
    • 3 years ago
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    that's the part im stuck from

  14. Mertsj
    • 3 years ago
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    |dw:1359320617741:dw|

  15. Mertsj
    • 3 years ago
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    That's the point of multiplying by x: the denominators cancel

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