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roselin

  • 3 years ago

find the derivative of u=5x+1/2 sqrt of x

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  1. zepdrix
    • 3 years ago
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    Rewrite the sqrt as a fractional exponent. From there, it will be easier to see what you need to do.( Psssst! Power rule!) \[\large u=5x+\frac{ 1 }{ 2 } x^{1/2}\]

  2. roselin
    • 3 years ago
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    okay,

  3. roselin
    • 3 years ago
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    after that, just plug in the values for each?

  4. zepdrix
    • 3 years ago
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    Hmm you shouldn't need to "plug" anything in, do you know how to take a derivative using the power rule?

  5. roselin
    • 3 years ago
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    i got 5/ x^1/2

  6. roselin
    • 3 years ago
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    yeah

  7. zepdrix
    • 3 years ago
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    Hmmm

  8. roselin
    • 3 years ago
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    nx^ n-1?

  9. roselin
    • 3 years ago
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    sorry

  10. zepdrix
    • 3 years ago
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    yes good, that's the derivative of x^n :)

  11. zepdrix
    • 3 years ago
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    |dw:1351713737221:dw| Understand what we did there? :O

  12. roselin
    • 3 years ago
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    yeah,

  13. roselin
    • 3 years ago
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    do i have to simplify it further?

  14. roselin
    • 3 years ago
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    or just leave it like that?

  15. zepdrix
    • 3 years ago
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    |dw:1351714227487:dw| You can write it like this if you want. But it's not a big deal. The first form of the answer we came up with is fine.

  16. roselin
    • 3 years ago
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    okay, thanks

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