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ggabby

  • 3 years ago

can you explain to me very explicitly how to do this problem and others on how to find the domain of f and g with f(x)=3x^2+2 and g(x)=2x thanks

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  1. baldymcgee6
    • 3 years ago
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    Do you mean f of g as in f(g(x))?

  2. ggabby
    • 3 years ago
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    yea I think

  3. baldymcgee6
    • 3 years ago
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    or each function separately?

  4. baldymcgee6
    • 3 years ago
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    I'm not sure what you are specifically asking...?

  5. ggabby
    • 3 years ago
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    f(g(x))

  6. baldymcgee6
    • 3 years ago
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    okay, so do you know what f(g(x)) = ?

  7. baldymcgee6
    • 3 years ago
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    No, but similar, think of f(g(x) as: anytime there is an "x" in the function f(x), replace the x with g(x), which is 2x

  8. baldymcgee6
    • 3 years ago
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    so its really: f(g(x) = 3(g(x))^2 + 2

  9. ggabby
    • 3 years ago
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    ohh ok

  10. baldymcgee6
    • 3 years ago
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    which is specifically: f(g(x)) = 3(2x)^2 +2

  11. ggabby
    • 3 years ago
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    ok thanks first time using this site

  12. baldymcgee6
    • 3 years ago
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    ok, feel free to give me a medal by choosing "best response". :)

  13. baldymcgee6
    • 3 years ago
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    awesome, let me know if you need more help.

  14. ggabby
    • 3 years ago
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    ok ill post something maybe

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