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anonymous

  • one year ago

Given the exponential equation 2^x = 8, what is the logarithmic form of the equation in base 10?

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  1. anonymous
    • one year ago
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    help will medal you

  2. anonymous
    • one year ago
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    Do you know how to write 2^x = 8 as a logarithmic equation of base 2?

  3. anonymous
    • one year ago
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    i do not

  4. anonymous
    • one year ago
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    Exponential and logarithmic forms are just two different ways to write the same equation. For example, we know that \(3^2=9\). That is the exponential form of the equation. The log from is \(\log_{3} 9=2\). They mean exactly the same thing. This is how you go from one form to the other |dw:1439501752391:dw|

  5. anonymous
    • one year ago
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    See if you can fill in the numbers from your equation |dw:1439501859795:dw|

  6. anonymous
    • one year ago
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    oh so it would be log_2=8 ?

  7. anonymous
    • one year ago
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    not quite. The 8 should be on the other side of the equation and it looks like you dropped the x|dw:1439501996772:dw|

  8. anonymous
    • one year ago
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    oh true so that would equal 3?

  9. anonymous
    • one year ago
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    Yes, x does equal 3, but it doesn't look like they want you to solve for it. They want you to rewrite the equation, but keep the x

  10. anonymous
    • one year ago
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    It's like a multiple choice question so I have answer choices I can show you if you want to see them

  11. anonymous
    • one year ago
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    I don't really need them. Once you have the log equation with base 2 all we have to do is use the change of base formula to convert it to base 10.

  12. anonymous
    • one year ago
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    What's the formula you have so far?

  13. anonymous
    • one year ago
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    I don't have any right now like I don't know how to do this at all tbh

  14. anonymous
    • one year ago
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    I put a graphic up. Follow the arrows to put the numbers/variables in the right place to convert the equation from exponential to logarithmic. Here it is in case you missed it|dw:1439502539460:dw|

  15. anonymous
    • one year ago
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    so log_2 8= x and then do we have to solve it or something?

  16. anonymous
    • one year ago
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    no. you don't have to solve it

  17. anonymous
    • one year ago
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    oh nevermind we dont solve it but what do we do w it?

  18. anonymous
    • one year ago
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    we're going to use the change of base formula to convert it to base 10.|dw:1439502646197:dw|

  19. anonymous
    • one year ago
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    So you should have \[x=\frac{ \log 8 }{ \log 2 }\]

  20. anonymous
    • one year ago
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    right so do i solve that?

  21. anonymous
    • one year ago
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    that's the answer

  22. anonymous
    • one year ago
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    oh i have an answer choice that looks like x=log_10 2 divided by log_10 8

  23. anonymous
    • one year ago
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    would that be correct?

  24. anonymous
    • one year ago
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    no the 8 has to be on top. Is there one that has \[x=\frac{ \log_{10} 8 }{ \log_{10}2 }\]

  25. anonymous
    • one year ago
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    yes! would that be correct?

  26. anonymous
    • one year ago
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    Yes That's the same thing as above, except the 10 isn't usually written because it's understood.

  27. anonymous
    • one year ago
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    oh okay thank you so much!

  28. anonymous
    • one year ago
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    you're welcome

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