roselin
find the derivative of u=5x+1/2 sqrt of x
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zepdrix
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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!)
\[\large u=5x+\frac{ 1 }{ 2 } x^{1/2}\]
roselin
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okay,
roselin
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after that, just plug in the values for each?
zepdrix
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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?
roselin
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i got 5/ x^1/2
roselin
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yeah
zepdrix
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Hmmm
roselin
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nx^ n-1?
roselin
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sorry
zepdrix
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yes good, that's the derivative of x^n :)
zepdrix
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|dw:1351713737221:dw|
Understand what we did there? :O
roselin
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yeah,
roselin
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do i have to simplify it further?
roselin
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or just leave it like that?
zepdrix
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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.
roselin
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okay, thanks