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spareb665

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

  • one year ago
  • one year ago

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  1. Mertsj
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    What is another form of 3ln2?

    • one year ago
  2. spareb665
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    In(8)?

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

    • one year ago
  4. spareb665
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    idk In(40)?

    • one year ago
  5. Mertsj
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    Yes. So now we have:

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

    • one year ago
  7. Mertsj
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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.

    • one year ago
  8. Mertsj
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    What did you get?

    • one year ago
  9. spareb665
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    I got -0.1879018247

    • one year ago
  10. spareb665
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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

    • one year ago
  11. Mertsj
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    Round it to -.19

    • one year ago
  12. spareb665
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    did i do that right? x= -.19 ?

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

    • one year ago
  14. Mertsj
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    Also, that is what I got.

    • one year ago
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