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zepdrix Group TitleBest ResponseYou've already chosen the best response.1
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 years ago

roselin Group TitleBest ResponseYou've already chosen the best response.0
after that, just plug in the values for each?
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
Hmm you shouldn't need to "plug" anything in, do you know how to take a derivative using the power rule?
 2 years ago

roselin Group TitleBest ResponseYou've already chosen the best response.0
i got 5/ x^1/2
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
yes good, that's the derivative of x^n :)
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
dw:1351713737221:dw Understand what we did there? :O
 2 years ago

roselin Group TitleBest ResponseYou've already chosen the best response.0
do i have to simplify it further?
 2 years ago

roselin Group TitleBest ResponseYou've already chosen the best response.0
or just leave it like that?
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
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.
 2 years ago

roselin Group TitleBest ResponseYou've already chosen the best response.0
okay, thanks
 2 years ago
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