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spareb665

  • 2 years ago

X=-In2/(3In2+In5) round the answer 2 digits after the decimal sign.

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  1. Mertsj
    • 2 years ago
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    What is another form of 3ln2?

  2. spareb665
    • 2 years ago
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    In(8)?

  3. Mertsj
    • 2 years ago
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    Yes. And what is another form of ln8 + ln5 ?

  4. spareb665
    • 2 years ago
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    idk In(40)?

  5. Mertsj
    • 2 years ago
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    Yes. So now we have:

  6. Mertsj
    • 2 years ago
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    \[x=- \frac{\ln 2}{\ln 40}\]

  7. Mertsj
    • 2 years ago
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    So pick up your calculator and find the ln of 2, divide it by the ln of 40, round the answer to two decimal places and change it to its opposite.

  8. Mertsj
    • 2 years ago
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    What did you get?

  9. spareb665
    • 2 years ago
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    I got -0.1879018247

  10. spareb665
    • 2 years ago
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    but im not sure if its right 2^3x+1=5^-x= (3x+1)In2=-xIn5 3xIn2+In2=-xIn5 3xIn2+xIn5=-In2 X(3In2+In5)=-In2 X=-In2/(3In2+In5) =-In2/In40 = -0.1879018247

  11. Mertsj
    • 2 years ago
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    Round it to -.19

  12. spareb665
    • 2 years ago
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    did i do that right? x= -.19 ?

  13. Mertsj
    • 2 years ago
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    Replace x with -.19 and see if it makes the original equation true.

  14. Mertsj
    • 2 years ago
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    Also, that is what I got.

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