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anonymous

  • one year ago

What is the inverse function of y=4*(9)^x

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  1. anonymous
    • one year ago
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    That y is equal to four times nine to the power of x

  2. freckles
    • one year ago
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    Have you tried solving for x yet?

  3. freckles
    • one year ago
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    you could first put it in this form: \[p=a^x \text{ then rewrite as } \log_a(p)=x\]

  4. freckles
    • one year ago
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    that is you divide both sides by 4 first you will have that desired form I mentioned .

  5. anonymous
    • one year ago
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    I am lost I don't know how to do this

  6. anonymous
    • one year ago
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    yo freckles log is too advanced original question is y=4*(9)^x inverse, flip the x and y x = 4*(9)^y solve for x

  7. anonymous
    • one year ago
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    ?

  8. anonymous
    • one year ago
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    sorry i meant solve for y

  9. anonymous
    • one year ago
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    I don't know how

  10. anonymous
    • one year ago
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    That link shows fractions my problem doesn't have fraction

  11. freckles
    • one year ago
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    \[\text{ In general, for something like: } y=b(a)^x \\ \text{ You can solve for } x \text{ by first doing } \\ \text{ division of } b \text{ on both sides } \\ \frac{y}{b}=a^x \\ \text{ now recall } \frac{y}{b}=a^x \text{ is equivalent to } \log_a(\frac{y}{b})=x\]

  12. freckles
    • one year ago
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    just using what I had above and replacing my p with y/b

  13. anonymous
    • one year ago
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    ?

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spraguer (Moderator)
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