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anonymous

  • one year ago

Need help finding the derivative of f(x)=(e^4x)/(8x+4)

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  1. anonymous
    • one year ago
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    |dw:1442905786638:dw|

  2. anonymous
    • one year ago
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    i hope that is correct so far..

  3. anonymous
    • one year ago
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    i end up with the wrong answer

  4. FireKat97
    • one year ago
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    Yup, that looks good so far!

  5. FireKat97
    • one year ago
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    Try and simplify it and show me what you get

  6. anonymous
    • one year ago
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    ok. when i simplify i get |dw:1442907337629:dw|

  7. anonymous
    • one year ago
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    am i supposed to expand the bottom?

  8. anonymous
    • one year ago
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    or distribute the 4e^(4x) to the (8x+4)?

  9. FireKat97
    • one year ago
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    If the question asks you to simplify, I'm guessing to expand the bottom and cancel out whatever you can would be your best bet

  10. FireKat97
    • one year ago
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    But if I had written the above answer in an exam, I believe it would be good enough to secure the full marks, it really depends on what your teacher wants and how far he/she wants you to simplify it

  11. anonymous
    • one year ago
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    well the question is to find the equation of the line tangent to the graph of that function at point (3,f(3)) and i know i have to take the derivative first so thats what i was doing... but you're saying that answer is good enough to continue solving the rest of the problem?

  12. FireKat97
    • one year ago
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    yep, because now you have to substitute and thats usually just done on the calculator, so there isn't much point in simplifying more than necessary and wasting time

  13. anonymous
    • one year ago
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    ok thanks

  14. FireKat97
    • one year ago
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    no problem :)

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spraguer (Moderator)
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